https://wiki.iac.isu.edu/api.php?action=feedcontributions&user=Kosiolek&feedformat=atomNew IAC Wiki - User contributions [en]2024-03-29T09:11:47ZUser contributionsMediaWiki 1.35.2https://wiki.iac.isu.edu/index.php?title=Multi-hit_data&diff=101182Multi-hit data2015-06-08T18:46:32Z<p>Kosiolek: </p>
<hr />
<div>{|border="1" class="wikitable style="text-align:center"<br />
|-<br />
! Thick DU target run# !! # of multi-hit events per run !! Total # of events per run !! Run duration, sec<br />
|-<br />
| 4118 || 0 || 1,668,482 || 5,562<br />
|-<br />
| 4119 || 0 || 2,135,901 || 7,120<br />
|-<br />
| 4133 || 0 || 1,704,331 || 5,681<br />
|-<br />
| 4134 || 0 || 1,732,490 || 5,775<br />
|-<br />
| 4135 || 0 || 1,603,604 || 5,345<br />
|-<br />
| 4137 || 0 || 800,699 || 2,669<br />
|-<br />
| 4144 || 0 || 1,645,667 || 5,486<br />
|-<br />
| 4145 || 0 || 1,544,605 || 5,149<br />
|-<br />
| 4146 || 0 || 510,826 || 1,703<br />
|-<br />
| 4153 || 0 || 1,750,657 || 5,836<br />
|-<br />
| 4154 || 0 || 1,631,436 || 5,438<br />
|-<br />
| 4155 || 0 || 1,062,048 || 3,540<br />
|-<br />
| 4166 || 0 || 214,600 || 715<br />
|-<br />
| 4169 || 0 || 191,592 || 639<br />
|-<br />
| 4170 || 0 || 429,974 || 1,433<br />
|-<br />
| 4171 || 0 || 1,141,113 || 3,804<br />
|-<br />
| 4172 || 0 || 650,734 || 2,169<br />
|-<br />
| 4173 || 0 || 354,992 || 1,183<br />
|-<br />
| 4174 || 0 || 953,831 || 3,179<br />
|-<br />
| 4175 || 0 || 299,086 || 997<br />
|-<br />
| 4176 || 0 || 144,774 || 483<br />
|-<br />
| 4177 || 0 || 225,877 || 753<br />
|-<br />
| 4203 || 0 || 659,050 || 2,197<br />
|-<br />
| 4204 || 0 || 1,636,192 || 5,454<br />
|}<br />
<br />
The data above mean that there were no events when specific TDC channel was fired more than one time per event.</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101180X-talk between n-dets2015-06-08T16:09:52Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)=\frac{N^{n+\gamma}_{detected}}{N^{in}_n} = \frac{1115}{10^5} \approx 1.1 %</math></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101176X-talk between n-dets2015-06-08T15:50:45Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101175X-talk between n-dets2015-06-08T15:46:20Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)=\frac{N^{n+\gamma}_{detected}}{N^{in}_n} = \frac{1115}{10^5} \approx 1.1 %</math></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101174X-talk between n-dets2015-06-08T15:33:26Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)=\frac{N^{n+\gamma}_{detected}}{N^{in}_n} = \frac{1115}{10^5} \approx 1.1 %</math></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101173X-talk between n-dets2015-06-08T15:32:54Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)=\frac{N^{n+\gamma}_{detected}}{N^{in}_n} = \frac{1115}{10^5} </math></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101172X-talk between n-dets2015-06-08T15:32:04Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)=\frac{N^{n+\gamma}_{detected}}{N^{in}_n} </math></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101171X-talk between n-dets2015-06-08T15:31:37Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)=\frac{N_{detected}}{N^{in}_n} </math></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101170X-talk between n-dets2015-06-08T15:30:31Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect <math>(X_t)</math> can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold the <math>X_t(iso)= </math</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101169X-talk between n-dets2015-06-08T15:29:07Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented below for both types of neutron sources:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
Cumulative energy spectrum of all particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect (<math>(X_t)</math>) can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101168X-talk between n-dets2015-06-08T15:28:15Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete. Energy spectrum of the photons is presented for both types of neutron sources.<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect (<math>(X_t)</math>) can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101167X-talk between n-dets2015-06-08T15:27:14Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Total number of neutrons initially sampled was <math>10^5</math>. Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]<br />
<br />
According to the simulation the cross talk effect (<math>(X_t)</math>) can be defined in the following way. Assuming that both detectors had 100 % efficiency, i.e. all the particles that hit the detector volume produced detectable signal, and 0 keV energy threshold</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101166X-talk between n-dets2015-06-08T15:20:56Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and produced a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101165X-talk between n-dets2015-06-08T15:20:15Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector (filled with vacuum and efficiency 100 %) was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101164X-talk between n-dets2015-06-08T15:18:36Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particl[[File:Espectrum_incident_neutrons.png | 400px]]es_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
The energy spectrum of neutrons used in this simulation looked like with different angular distributions (isotropic and directed):<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101163X-talk between n-dets2015-06-08T15:17:32Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
The spectrum of neutrons used in this simulation looked like:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101162X-talk between n-dets2015-06-08T15:16:29Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101161X-talk between n-dets2015-06-08T15:15:14Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
Protons should not be there due to incorrectly adjusted EM physics part of geant4. See Part II below.<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101160X-talk between n-dets2015-06-08T15:12:34Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top (cyan). There are 2" Pb+ 2" borated poly (in green) + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of 20 cm concrete blocks also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101159X-talk between n-dets2015-06-08T15:11:01Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup. In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding): <br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101158X-talk between n-dets2015-06-08T15:10:27Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding). In the picture below one can see one neutron event generated in the first neutron detector filled with BC-420. The second detector was used to detect the particles that could make through the shielding and possibly produce a false coincidence signal:<br />
<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101157X-talk between n-dets2015-06-08T15:08:01Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding):<br />
<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
Photons were generated through <math>(n,\gamma)</math> reaction on the materials of borated poly and concrete:<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
All particles that hit the second detector had the following energy spectrum:<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101155X-talk between n-dets2015-06-08T15:04:14Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface (this source was placed inside the shielding so no scattering initially by Pb shielding):<br />
<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101152X-talk between n-dets2015-06-08T15:02:25Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface:<br />
<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101151X-talk between n-dets2015-06-08T15:01:53Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101150X-talk between n-dets2015-06-08T15:01:37Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
Neutron energy spectrum detected by second neutron detector (<math>\epsilon=100%</math> and vacuum inside) in the case when two neutron souces were used: (1) isotropic (iso) volume neutron source inside the first neutron detector filled with BC-420, (2) directed neutron source when neutrons hit the first detector filled with BC-420 perpendicularly to its surface.<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:Total_iso_dericted.png&diff=101149File:Total iso dericted.png2015-06-08T14:57:14Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101148X-talk between n-dets2015-06-08T14:57:02Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also. Air is around the whole setup.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
[[File:photons_iso_dericted.png | 400px]]<br />
<br />
[[File:total_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:Photons_iso_dericted.png&diff=101147File:Photons iso dericted.png2015-06-08T14:55:48Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:Neutrons_iso_dericted.png&diff=101146File:Neutrons iso dericted.png2015-06-08T14:55:31Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101145X-talk between n-dets2015-06-08T14:55:12Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]<br />
<br />
[[File:neutrons_iso_dericted.png | 400px]]<br />
<br />
[[File:photons_iso_dericted.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101144X-talk between n-dets2015-06-08T14:52:37Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top. There are 2" Pb+ 2" BP + 2" Pb in between the detectors. Substrate is made of 0.5 m concrete. Reflectors on the sides are made of concrete also.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101143X-talk between n-dets2015-06-08T14:50:48Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
Experimental setup simulated. Neutron detectors are in red, shielded with 2" Pb on the top.<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:Detector_shielding_setup2.png&diff=101142File:Detector shielding setup2.png2015-06-08T14:48:51Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101141X-talk between n-dets2015-06-08T14:47:54Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'''Part II'''<br />
<br />
[[File:Detector_shielding_setup2.png | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=X-talk_between_n-dets&diff=101140X-talk between n-dets2015-06-08T14:47:01Z<p>Kosiolek: </p>
<hr />
<div>Behaviour of lead and borated poly under the neutron radiation:<br />
<br />
[[File:Borated_poly_sim.pdf]]<br />
<br />
[[File:lead_shield.pdf]]<br />
<br />
The simulation of the cross talk between two neutron detectors was performed using GEANT4 program. The simulated detector layout is shown below:<br />
<br />
[[File:Detector_shielding_setup.png | 400px]]<br />
<br />
The following stages of simulation of the x-talk were considered:<br />
<br />
1) the x-talk effect is due to the acceptance of the analysing detector, i.e. there was no shielding in between the two detectors;<br />
<br />
2) only 2" of borated poly (5%) was placed in between;<br />
<br />
3) borated poly was placed in between two layers of 1" lead layers;<br />
<br />
4) 2 cm Al layer was added to the shielding described in stages 1)-3) from the side of the analysing detector.<br />
<br />
The number of incident particle (neutrons) was <math>10^5</math> and their energy spectrum is shown below:<br />
<br />
[[File:Espectrum_incident_neutrons.png | 400px]]<br />
<br />
Neutrons were incident uniformly over the surface of one of the neutron detectors normally to the surface w/o hitting the shielding and the analysing detector such that we have pure x-talk effect due to neutron interaction with the material BC-420 of the neutron detector being irradiated. The analysing detector detected all the particles scattered/produced in the shielding/BC-420.<br />
<br />
'''Stage 1 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector is presented below:<br />
<br />
[[File:all_particles_noShield.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_noShield.png | 400px]]<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_noShield.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_noShield.png | 400px]]<br />
<br />
'''Stage 2 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after placing 2" of borated poly in between the detectors is presented below:<br />
<br />
[[File:all_particles_2inBorPoly.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
[[File:neutrons_2inBorPoly.png | 400px]]<br />
<br />
the following number of photons (photon peak ~2.2MeV can be seen as a result of neutron capture reaction):<br />
<br />
[[File:photons_2inBorPoly.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly.png | 400px]]<br />
<br />
'''Stage 3 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb.png | 400px]]<br />
<br />
Out of the cumulative particle energy spectrum we have the following number of neutrons:<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb.png | 400px]]<br />
<br />
'''Stage 4 of the simulation'''<br />
<br />
The energy spectrum of all possible particles entering the analysing detector after adding 2 cm of Aluminium to 2 layers of 1" lead placed at the sides of the 2" borated poly is presented below:<br />
<br />
[[File:all_particles_2inBorPoly2inPb2cmAl2.png | 400px]]<br />
<br />
NO neutrons observed.<br />
<br />
the following number of photons:<br />
<br />
[[File:photons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
and the following number of protons:<br />
<br />
[[File:protons_2inBorPoly2inPb2cmAl.png | 400px]]<br />
<br />
'''Future work'''<br />
<br />
Now we should see the correlation of the energy lost per particle for the given event to understand how many particles will produce energy loss in both detectors high enough to be considered as a source of cross talk. Also the effect of interaction of bremsstrahlung radiation with the material of the neutron detector and the corresponding cross talk should be considered.<br />
<br />
'Part II'</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=DAQ_pics&diff=101001DAQ pics2015-05-09T06:27:36Z<p>Kosiolek: </p>
<hr />
<div>[[File:DAQ1.jpg | 400px]]<br />
<br />
[[File:DAQ2.jpg | 400px]]<br />
<br />
[[File:DAQ3.jpg | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:DAQ3.jpg&diff=101000File:DAQ3.jpg2015-05-09T06:26:28Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:DAQ2.jpg&diff=100999File:DAQ2.jpg2015-05-09T06:26:08Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=File:DAQ1.jpg&diff=100998File:DAQ1.jpg2015-05-09T06:25:41Z<p>Kosiolek: </p>
<hr />
<div></div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=DAQ_pics&diff=100997DAQ pics2015-05-09T06:25:05Z<p>Kosiolek: Created page with " 400px 400px 400px 400px 400px"</p>
<hr />
<div>[[File:DAQ1.jpg | 400px]]<br />
<br />
[[File:DAQ2.jpg | 400px]]<br />
<br />
[[File:DAQ3.jpg | 400px]]<br />
<br />
[[File:DAQ4.jpg | 400px]]<br />
<br />
[[File:DAQ5.jpg | 400px]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=2nCor_Equipment&diff=1009962nCor Equipment2015-05-09T06:24:06Z<p>Kosiolek: </p>
<hr />
<div>=Detectors=<br />
==PMTs==<br />
<br />
<br />
http://www.hamamatsu.com/resources/pdf/etd/R580_TPMH1100E.pdf<br />
<br />
==Scintillators==<br />
<br />
==e+e- spectrometer==<br />
<br />
=DAQ electronics=<br />
<br />
==Signal Processing==<br />
<br />
===Discriminator===<br />
<br />
CAEN N841<br />
<br />
<br />
The pulse forming stage of the discriminator produces an output pulse whose width is adjustable in a range from 5 ns to 40 ns. Each channel can work both in Updating and Non-Updating mode according to on-board jumpers position. The discriminator thresholds are individually settable in a range from -1 mV to -255 mV (1 mV step), via an 8-bit DAC. The minimum detectable signal is -5 mV. The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.<br />
<br />
[[File:CAEN_N841_Manual.pdf]]<br />
<br />
{| border="1"<br />
| LED output pulse width [arb. units] || Pulse width seen by the oscscope [ns]<br />
|-<br />
| 10 || 6.3<br />
|-<br />
| 20 || 6.6 <br />
|-<br />
|40 || 7.1<br />
|-<br />
|60 || 7.6<br />
|-<br />
| 90 || 8.5<br />
|-<br />
| 120 || 9.5 <br />
|-<br />
| 160 || 12.0 <br />
|-<br />
| 190 || 15.1<br />
|-<br />
| 230 || 24.8<br />
|-<br />
| 250 || 43.5<br />
|}<br />
<br />
===NIM-ECL converter===<br />
<br />
<br />
Phillips Model 726 <br />
<br />
[[File:Phillip_726_Nim2ECL.pdf]]<br />
<br />
==TDC==<br />
<br />
Detector name convention<br />
: BLUT = Beam Left Upstream Top pmt<br />
<br />
==3/19/15==<br />
;TDC channel Map (Thursday)<br />
{| border="1"<br />
| Detector || Angle ||TDC channel || NIM-ECL channel|| Patch Pannel # || ROOT vaiable<br />
|-<br />
| BLUT || 135 ||TDC 16 || in B ch 0 || 223A6 || evt.TDC[16]<br />
|-<br />
| BLUB || 135 || TDC 17 || in B ch 1|| 223A7|| evt.TDC[17]<br />
|-<br />
| BRT|| 270|| TDC 24||in A ch 0 ||223A14|| evt.TDC[24]<br />
|-<br />
| BRB|| 270|| TDC 25||in A ch 1 ||223A15|| evt.TDC[25]<br />
|-<br />
|-<br />
| BLDT || 45 ||TDC 26 || in A ch 2 || 223A16 || evt.TDC[26]<br />
|-<br />
| BLDB || 45 || TDC 27 || in A ch 3|| 223A17|| evt.TDC[27]<br />
|-<br />
| Trig Delay || || TDC 30 || in A ch 6|| || evt.TDC[30]<br />
|-<br />
| Photon flux monitor || 90 || TDC 29 || in A ch 5|| 223A10 || evt.TDC[29]<br />
|}<br />
<br />
==3/24/15==<br />
;TDC channel Map 3/24/15<br />
{| border="1"<br />
| Detector || Angle ||Single hit TDC channel ||LED channel || NIM-ECL channel|| Patch Pannel # || ROOT vaiable ||MultiHit TDC channel<br />
|-<br />
| 1 top (BRT)|| 270|| 24|| 0 ||in A ch 0 ||223A5|| evt.TDC[24] || 8<br />
|-<br />
| 1 bottom (BRB)|| 270|| 25|| 1 ||in A ch 1 ||223A6|| evt.TDC[25] || 9<br />
|-<br />
| 2 top BLDT || 45 ||16 || 2|| in B ch 0 || 223A7 || evt.TDC[16]|| 0<br />
|-<br />
| 2 bottom BLDB || 45 || 17 || 3|| in B ch 1|| 223A8|| evt.TDC[17] ||1<br />
|-<br />
| 3 top || 60 ||26 ||4 || in A ch 2 || 223A9 || evt.TDC[26]||10<br />
|-<br />
| 3 bottom || 60 || 27 || 5|| in A ch 3|| 223A10|| evt.TDC[27]||11<br />
|-<br />
| 4 top BLUT || 135 ||18 ||6|| in B ch 2 || 223A11 || evt.TDC[18]||2<br />
|-<br />
| 4 bottom BLUB || 135 || 19 ||7|| in B ch 3|| 223A12|| evt.TDC[19]||3<br />
|-<br />
| 5 upstream || 135 ||20 ||10|| in B ch 4 || 223A15 || evt.TDC[20]||4<br />
|-<br />
| 5 downstream|| 135 || 21 ||11|| in B ch 5|| 223A16|| evt.TDC[21]||5<br />
|-<br />
| 6 upstream || 135 || 30 || 12||in A ch 6 || 223A17 || evt.TDC[30]||14<br />
|-<br />
| 6 downstream || 135 || 31 ||13|| in A ch 7|| 223A18|| evt.TDC[31]||15<br />
|-<br />
| e+ spect || || 29 ||9|| in A ch 5||223A14 || evt.TDC[29]||13<br />
|-<br />
| Trig Delay || || 22 ||14|| in B ch 6|| || evt.TDC[22]||6<br />
|}<br />
<br />
[[DAQ pics]]<br />
<br />
[[TDC calibration]]<br />
<br />
==03/25/15==<br />
<br />
[[Multi hit TDC timing]]<br />
<br />
==Wiring Work==<br />
<br />
* 3/25/2015<br />
** Sean and Glen examined all of the signals from detectors 1 through 6<br />
** We used the signal from the LEMO cables that go directly into the discriminator<br />
** We also used the scope's Acquire->Average option and set the average to 512; This allowed for a more reliable comparison between signals<br />
*** Note that the threshold can be adjusted and that the average will be biased toward smaller pulse heights if there is a lot of noise<br />
** Found an RG-62 cable connected between the bottom PMT of Det 3 and the patch panel A10<br />
*** Replaced with RG-58 cable<br />
** A10 cable also found to be RG-58 from the experiment room to the counting room; Signal on 3B was degraded in the control room<br />
*** Changed to A19 (RG-223 the whole length) and the signal looked similar to the others<br />
** Found that detector 5 top and bottom both were small and have the ~12 ns ringing<br />
*** Increased voltage to 1500V <br />
*** The non-extending gates from the discriminator will help with this<br />
*** Recommend a gate width of 20 to 25 ns from the discriminator to eliminate double pulsing from ringing on Det 5<br />
*** Should not matter for other detectors<br />
*** Will also not affect high energy neutrons since 6 MeV neutrons are 30 ns ToF at 1 meter<br />
** When testing was complete, verified that all cables are associated with the appropriate detector<br />
** Top/Bottom, Upstream/Downstream should not have been reversed for any detectors in the process but that has not been confirmed; this should be correctable in software<br />
<br />
==ADC==<br />
<br />
=Software=<br />
<br />
Ntuple maker<br />
<br />
To make the Tree containing the TDC, QDC, and PDC data run the following command<br />
<br />
<br />
source ~/CODA/setup<br />
<br />
/home/daq/CODA/CODAreader/ROOT_V5.30/v775v792v785/evio2nt -fr8735.dat >/dev/null<br />
<br />
rename the output file to a root file<br />
<br />
mv r8735 r8735.root<br />
<br />
root -l r8735.root<br />
<br />
to draw a histogram for TDC channel 16 <br />
<br />
DAQ->Draw("evt.TDC[17]>>(4096,0,4096)");<br />
<br />
<br />
for the multihit TDC data taken with daq2<br />
<br />
CODA/CODAreader/ROOT_V5.30/R1DC/evio2nt -fr4516.dat > /dev/null<br />
<br />
R1DC->Draw("(evt.TDC1190[1][3])");<br />
<br />
R1DC->Draw("(evt.TDC1190[1][6]-evt.TDC1190[2][6])/10>>(4096,-4096,4096));<br />
<br />
On 4/9/2015 the above should be 4000 channel = 400 ns<br />
<br />
<br />
<br />
[[2nCor_44]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=2nCor_Equipment&diff=1009812nCor Equipment2015-05-07T23:06:47Z<p>Kosiolek: /* 3/24/15 */</p>
<hr />
<div>=Detectors=<br />
==PMTs==<br />
<br />
<br />
http://www.hamamatsu.com/resources/pdf/etd/R580_TPMH1100E.pdf<br />
<br />
==Scintillators==<br />
<br />
==e+e- spectrometer==<br />
<br />
=DAQ electronics=<br />
<br />
==Signal Processing==<br />
<br />
===Discriminator===<br />
<br />
CAEN N841<br />
<br />
<br />
The pulse forming stage of the discriminator produces an output pulse whose width is adjustable in a range from 5 ns to 40 ns. Each channel can work both in Updating and Non-Updating mode according to on-board jumpers position. The discriminator thresholds are individually settable in a range from -1 mV to -255 mV (1 mV step), via an 8-bit DAC. The minimum detectable signal is -5 mV. The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.<br />
<br />
[[File:CAEN_N841_Manual.pdf]]<br />
<br />
{| border="1"<br />
| LED output pulse width [arb. units] || Pulse width seen by the oscscope [ns]<br />
|-<br />
| 10 || 6.3<br />
|-<br />
| 20 || 6.6 <br />
|-<br />
|40 || 7.1<br />
|-<br />
|60 || 7.6<br />
|-<br />
| 90 || 8.5<br />
|-<br />
| 120 || 9.5 <br />
|-<br />
| 160 || 12.0 <br />
|-<br />
| 190 || 15.1<br />
|-<br />
| 230 || 24.8<br />
|-<br />
| 250 || 43.5<br />
|}<br />
<br />
===NIM-ECL converter===<br />
<br />
<br />
Phillips Model 726 <br />
<br />
[[File:Phillip_726_Nim2ECL.pdf]]<br />
<br />
==TDC==<br />
<br />
Detector name convention<br />
: BLUT = Beam Left Upstream Top pmt<br />
<br />
==3/19/15==<br />
;TDC channel Map (Thursday)<br />
{| border="1"<br />
| Detector || Angle ||TDC channel || NIM-ECL channel|| Patch Pannel # || ROOT vaiable<br />
|-<br />
| BLUT || 135 ||TDC 16 || in B ch 0 || 223A6 || evt.TDC[16]<br />
|-<br />
| BLUB || 135 || TDC 17 || in B ch 1|| 223A7|| evt.TDC[17]<br />
|-<br />
| BRT|| 270|| TDC 24||in A ch 0 ||223A14|| evt.TDC[24]<br />
|-<br />
| BRB|| 270|| TDC 25||in A ch 1 ||223A15|| evt.TDC[25]<br />
|-<br />
|-<br />
| BLDT || 45 ||TDC 26 || in A ch 2 || 223A16 || evt.TDC[26]<br />
|-<br />
| BLDB || 45 || TDC 27 || in A ch 3|| 223A17|| evt.TDC[27]<br />
|-<br />
| Trig Delay || || TDC 30 || in A ch 6|| || evt.TDC[30]<br />
|-<br />
| Photon flux monitor || 90 || TDC 29 || in A ch 5|| 223A10 || evt.TDC[29]<br />
|}<br />
<br />
==3/24/15==<br />
;TDC channel Map 3/24/15<br />
{| border="1"<br />
| Detector || Angle ||Single hit TDC channel ||LED channel || NIM-ECL channel|| Patch Pannel # || ROOT vaiable ||MultiHit TDC channel<br />
|-<br />
| 1 top (BRT)|| 270|| 24|| 0 ||in A ch 0 ||223A5|| evt.TDC[24] || 8<br />
|-<br />
| 1 bottom (BRB)|| 270|| 25|| 1 ||in A ch 1 ||223A6|| evt.TDC[25] || 9<br />
|-<br />
| 2 top BLDT || 45 ||16 || 2|| in B ch 0 || 223A7 || evt.TDC[16]|| 0<br />
|-<br />
| 2 bottom BLDB || 45 || 17 || 3|| in B ch 1|| 223A8|| evt.TDC[17] ||1<br />
|-<br />
| 3 top || 60 ||26 ||4 || in A ch 2 || 223A9 || evt.TDC[26]||10<br />
|-<br />
| 3 bottom || 60 || 27 || 5|| in A ch 3|| 223A10|| evt.TDC[27]||11<br />
|-<br />
| 4 top BLUT || 135 ||18 ||6|| in B ch 2 || 223A11 || evt.TDC[18]||2<br />
|-<br />
| 4 bottom BLUB || 135 || 19 ||7|| in B ch 3|| 223A12|| evt.TDC[19]||3<br />
|-<br />
| 5 upstream || 135 ||20 ||10|| in B ch 4 || 223A15 || evt.TDC[20]||4<br />
|-<br />
| 5 downstream|| 135 || 21 ||11|| in B ch 5|| 223A16|| evt.TDC[21]||5<br />
|-<br />
| 6 upstream || 135 || 30 || 12||in A ch 6 || 223A17 || evt.TDC[30]||14<br />
|-<br />
| 6 downstream || 135 || 31 ||13|| in A ch 7|| 223A18|| evt.TDC[31]||15<br />
|-<br />
| e+ spect || || 29 ||9|| in A ch 5||223A14 || evt.TDC[29]||13<br />
|-<br />
| Trig Delay || || 22 ||14|| in B ch 6|| || evt.TDC[22]||6<br />
|}<br />
<br />
<br />
[[TDC calibration]]<br />
<br />
==03/25/15==<br />
<br />
[[Multi hit TDC timing]]<br />
<br />
==Wiring Work==<br />
<br />
* 3/25/2015<br />
** Sean and Glen examined all of the signals from detectors 1 through 6<br />
** We used the signal from the LEMO cables that go directly into the discriminator<br />
** We also used the scope's Acquire->Average option and set the average to 512; This allowed for a more reliable comparison between signals<br />
*** Note that the threshold can be adjusted and that the average will be biased toward smaller pulse heights if there is a lot of noise<br />
** Found an RG-62 cable connected between the bottom PMT of Det 3 and the patch panel A10<br />
*** Replaced with RG-58 cable<br />
** A10 cable also found to be RG-58 from the experiment room to the counting room; Signal on 3B was degraded in the control room<br />
*** Changed to A19 (RG-223 the whole length) and the signal looked similar to the others<br />
** Found that detector 5 top and bottom both were small and have the ~12 ns ringing<br />
*** Increased voltage to 1500V <br />
*** The non-extending gates from the discriminator will help with this<br />
*** Recommend a gate width of 20 to 25 ns from the discriminator to eliminate double pulsing from ringing on Det 5<br />
*** Should not matter for other detectors<br />
*** Will also not affect high energy neutrons since 6 MeV neutrons are 30 ns ToF at 1 meter<br />
** When testing was complete, verified that all cables are associated with the appropriate detector<br />
** Top/Bottom, Upstream/Downstream should not have been reversed for any detectors in the process but that has not been confirmed; this should be correctable in software<br />
<br />
==ADC==<br />
<br />
=Software=<br />
<br />
Ntuple maker<br />
<br />
To make the Tree containing the TDC, QDC, and PDC data run the following command<br />
<br />
<br />
source ~/CODA/setup<br />
<br />
/home/daq/CODA/CODAreader/ROOT_V5.30/v775v792v785/evio2nt -fr8735.dat >/dev/null<br />
<br />
rename the output file to a root file<br />
<br />
mv r8735 r8735.root<br />
<br />
root -l r8735.root<br />
<br />
to draw a histogram for TDC channel 16 <br />
<br />
DAQ->Draw("evt.TDC[17]>>(4096,0,4096)");<br />
<br />
<br />
for the multihit TDC data taken with daq2<br />
<br />
CODA/CODAreader/ROOT_V5.30/R1DC/evio2nt -fr4516.dat > /dev/null<br />
<br />
R1DC->Draw("(evt.TDC1190[1][3])");<br />
<br />
R1DC->Draw("(evt.TDC1190[1][6]-evt.TDC1190[2][6])/10>>(4096,-4096,4096));<br />
<br />
On 4/9/2015 the above should be 4000 channel = 400 ns<br />
<br />
<br />
<br />
[[2nCor_44]]</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10057304-22-20152015-04-25T23:53:18Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>===Pu-Be source test===<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
* Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4550_fake_stop.png|340px|Region 1]]<br />
| [[File:r4550_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4551_fake_stop.png|340px|Region 1]]<br />
| [[File:r4551_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4552_fake_stop.png|340px|Region 1]]<br />
| [[File:r4552_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4553_fake_stop.png|340px|Region 1]]<br />
| [[File:r4553_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4554_fake_stop.png|340px|Region 1]]<br />
| [[File:r4554_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4555_fake_stop.png|340px|Region 1]]<br />
| [[File:r4555_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4556_fake_stop.png|340px|Region 1]]<br />
| [[File:r4556_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4557_fake_stop.png|340px|Region 1]]<br />
| [[File:r4557_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
* Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4558_fake_stop.png|340px|Region 1]]<br />
| [[File:r4558_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4559_fake_stop.png|340px|Region 1]]<br />
| [[File:r4559_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4560_fake_stop.png|340px|Region 1]]<br />
| [[File:r4560_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
* Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4561_fake_stop.png|340px|Region 1]]<br />
| [[File:r4561_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10057204-22-20152015-04-25T23:52:25Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>===Pu-Be source test===<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
* Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4550_fake_stop.png|340px|Region 1]]<br />
| [[File:r4550_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4551_fake_stop.png|340px|Region 1]]<br />
| [[File:r4551_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4552_fake_stop.png|340px|Region 1]]<br />
| [[File:r4552_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4553_fake_stop.png|340px|Region 1]]<br />
| [[File:r4553_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4554_fake_stop.png|340px|Region 1]]<br />
| [[File:r4554_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4555_fake_stop.png|340px|Region 1]]<br />
| [[File:r4555_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4556_fake_stop.png|340px|Region 1]]<br />
| [[File:r4556_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4557_fake_stop.png|340px|Region 1]]<br />
| [[File:r4557_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4558_fake_stop.png|340px|Region 1]]<br />
| [[File:r4558_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4559_fake_stop.png|340px|Region 1]]<br />
| [[File:r4559_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4560_fake_stop.png|340px|Region 1]]<br />
| [[File:r4560_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4561_fake_stop.png|340px|Region 1]]<br />
| [[File:r4561_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10057104-22-20152015-04-25T19:45:34Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>===Pu-Be source test===<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4550_fake_stop.png|340px|Region 1]]<br />
| [[File:r4550_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4551_fake_stop.png|340px|Region 1]]<br />
| [[File:r4551_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4552_fake_stop.png|340px|Region 1]]<br />
| [[File:r4552_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4553_fake_stop.png|340px|Region 1]]<br />
| [[File:r4553_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4554_fake_stop.png|340px|Region 1]]<br />
| [[File:r4554_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4555_fake_stop.png|340px|Region 1]]<br />
| [[File:r4555_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4556_fake_stop.png|340px|Region 1]]<br />
| [[File:r4556_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4557_fake_stop.png|340px|Region 1]]<br />
| [[File:r4557_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4558_fake_stop.png|340px|Region 1]]<br />
| [[File:r4558_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4559_fake_stop.png|340px|Region 1]]<br />
| [[File:r4559_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4560_fake_stop.png|340px|Region 1]]<br />
| [[File:r4560_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4561_fake_stop.png|340px|Region 1]]<br />
| [[File:r4561_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10057004-22-20152015-04-25T19:44:17Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>===Pu-Be source test===<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4550_fake_stop.png|340px|Region 1]]<br />
| [[File:r4550_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4551_fake_stop.png|340px|Region 1]]<br />
| [[File:r4551_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4552_fake_stop.png|340px|Region 1]]<br />
| [[File:r4552_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4553_fake_stop.png|340px|Region 1]]<br />
| [[File:r4553_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4554_fake_stop.png|340px|Region 1]]<br />
| [[File:r4554_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4555_fake_stop.png|340px|Region 1]]<br />
| [[File:r4555_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4556_fake_stop.png|340px|Region 1]]<br />
| [[File:r4556_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4557_fake_stop.png|340px|Region 1]]<br />
| [[File:r4557_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4558_fake_stop.png|340px|Region 1]]<br />
| [[File:r4558_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4559_fake_stop.png|340px|Region 1]]<br />
| [[File:r4559_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4560_fake_stop.png|340px|Region 1]]<br />
| [[File:r4560_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4561_fake_stop.png|340px|Region 1]]<br />
| [[File:r4561_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10056904-22-20152015-04-25T19:43:33Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>==Pu-Be source test==<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4550_fake_stop.png|340px|Region 1]]<br />
| [[File:r4550_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4551_fake_stop.png|340px|Region 1]]<br />
| [[File:r4551_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4552_fake_stop.png|340px|Region 1]]<br />
| [[File:r4552_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4553_fake_stop.png|340px|Region 1]]<br />
| [[File:r4553_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4554_fake_stop.png|340px|Region 1]]<br />
| [[File:r4554_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4555_fake_stop.png|340px|Region 1]]<br />
| [[File:r4555_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4556_fake_stop.png|340px|Region 1]]<br />
| [[File:r4556_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4557_fake_stop.png|340px|Region 1]]<br />
| [[File:r4557_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4558_fake_stop.png|340px|Region 1]]<br />
| [[File:r4558_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4559_fake_stop.png|340px|Region 1]]<br />
| [[File:r4559_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4560_fake_stop.png|340px|Region 1]]<br />
| [[File:r4560_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4561_fake_stop.png|340px|Region 1]]<br />
| [[File:r4561_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10056804-22-20152015-04-25T19:41:03Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>==Pu-Be source test==<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4550_fake_stop.png|340px|Region 1]]<br />
| [[File:r4550_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4551_fake_stop.png|340px|Region 1]]<br />
| [[File:r4551_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4552_fake_stop.png|340px|Region 1]]<br />
| [[File:r4552_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4553_fake_stop.png|340px|Region 1]]<br />
| [[File:r4553_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4554_fake_stop.png|340px|Region 1]]<br />
| [[File:r4554_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4555_fake_stop.png | 500 px]]<br />
<br />
[[File:r4555_det4_up.png | 500 px]]<br />
<br />
<br />
Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4556_fake_stop.png | 500 px]]<br />
<br />
[[File:r4556_det4_up.png | 500 px]]<br />
<br />
Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
[[File:r4557_fake_stop.png | 500 px]]<br />
<br />
[[File:r4557_det4_up.png | 500 px]]<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4558_fake_stop.png | 500 px]]<br />
<br />
[[File:r4558_det4_up.png | 500 px]]<br />
<br />
Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
[[File:r4559_fake_stop.png | 500 px]]<br />
<br />
[[File:r4559_det4_up.png | 500 px]]<br />
<br />
Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
[[File:r4560_fake_stop.png | 500 px]]<br />
<br />
[[File:r4560_det4_up.png | 500 px]]<br />
<br />
Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
[[File:r4561_fake_stop.png | 500 px]]<br />
<br />
[[File:r4561_det4_up.png | 500 px]]<br />
<br />
<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolekhttps://wiki.iac.isu.edu/index.php?title=04-22-2015&diff=10056704-22-20152015-04-25T19:39:06Z<p>Kosiolek: /* Pu-Be source test */</p>
<hr />
<div>==Pu-Be source test==<br />
<br />
PMT detector #4 HV at -1000 Volts<br />
<br />
Pu-Be 18 gram source# M1197<br />
<br />
Run 4546 had a discriminator threshold set to 80 mV and the terminators were out. Cosmic rays test.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4546_fake_stop.png|340px|Region 1]]<br />
| [[File:r4546_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4547 had a discriminator threshold set to 80 mV and the terminators were out. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4547_fake_stop.png|340px|Region 1]]<br />
| [[File:r4547_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4548 had a discriminator threshold set to 80 mV and the terminators were in. DAQ rate is 100 Hz. Pu-Be source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4548_fake_stop.png|340px|Region 1]]<br />
| [[File:r4548_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
Run 4549 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
{| cellpadding="2" style="border: 1px solid darkgray;"<br />
|- border="0"<br />
| [[File:r4549_fake_stop.png|340px|Region 1]]<br />
| [[File:r4549_det4_up.png|340px|Region 2]]<br />
|- align="center"<br />
| Fake stop|| Second hit<br />
|}<br />
<br />
[[File:r4549_fake_stop.png | 500 px]]<br />
<br />
[[File:r4549_det4_up.png | 500 px]]<br />
<br />
<br />
Run 4550 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 2800 Hz. Pu-B source in.<br />
<br />
[[File:r4550_fake_stop.png | 500 px]]<br />
<br />
[[File:r4550_det4_up.png | 500 px]]<br />
<br />
Run 4551 had a discriminator threshold set to 40 mV and the terminators were out. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
[[File:r4551_fake_stop.png | 500 px]]<br />
<br />
[[File:r4551_det4_up.png | 500 px]]<br />
<br />
<br />
Run 4552 had a discriminator threshold set to 40 mV and the terminators were in. DAQ rate is 500 Hz. Pu-B source in, moved away from the detector by 26".<br />
<br />
[[File:r4552_fake_stop.png | 500 px]]<br />
<br />
[[File:r4552_det4_up.png | 500 px]]<br />
<br />
Run 4553 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 1850 Hz. Pu-Be source in, moved away from the detector by 26".<br />
<br />
[[File:r4553_fake_stop.png | 500 px]]<br />
<br />
[[File:r4553_det4_up.png | 500 px]]<br />
<br />
Run 4554 had a discriminator threshold set to 20 mV and the terminators were in. DAQ rate is 625 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4554_fake_stop.png | 500 px]]<br />
<br />
[[File:r4554_det4_up.png | 500 px]]<br />
<br />
Run 4555 had a discriminator threshold set to 20 mV and the terminators were out. DAQ rate is 650 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4555_fake_stop.png | 500 px]]<br />
<br />
[[File:r4555_det4_up.png | 500 px]]<br />
<br />
<br />
Run 4556 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 1400 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4556_fake_stop.png | 500 px]]<br />
<br />
[[File:r4556_det4_up.png | 500 px]]<br />
<br />
Run 4557 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 1400 Hz. Pu-B source in, moved away from the detector by 52".<br />
<br />
[[File:r4557_fake_stop.png | 500 px]]<br />
<br />
[[File:r4557_det4_up.png | 500 px]]<br />
<br />
PMT detector #4 HV at -1400 Volts<br />
<br />
Run 4558 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 4670 Hz. Pu-Be source in, moved away from the detector by 52".<br />
<br />
[[File:r4558_fake_stop.png | 500 px]]<br />
<br />
[[File:r4558_det4_up.png | 500 px]]<br />
<br />
Run 4559 had a discriminator threshold set to 10 mV and the terminators were in. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
[[File:r4559_fake_stop.png | 500 px]]<br />
<br />
[[File:r4559_det4_up.png | 500 px]]<br />
<br />
Run 4560 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 2700 Hz. Pu-Be source in, moved away from the detector by 91".<br />
<br />
[[File:r4560_fake_stop.png | 500 px]]<br />
<br />
[[File:r4560_det4_up.png | 500 px]]<br />
<br />
Run 4561 had a discriminator threshold set to 10 mV and the terminators were out. DAQ rate is 200 Hz. Cosmic rays test.<br />
<br />
[[File:r4561_fake_stop.png | 500 px]]<br />
<br />
[[File:r4561_det4_up.png | 500 px]]<br />
<br />
<br />
<br />
;1.8 g Pu-Be source should be used next time</div>Kosiolek