Difference between revisions of "Cf252 NaI detector test. 12 Apr 2012"

From New IAC Wiki
Jump to navigation Jump to search
(Blanked the page)
 
(5 intermediate revisions by the same user not shown)
Line 1: Line 1:
−
[https://wiki.iac.isu.edu/index.php/PhotoFission_with_Polarized_Photons_from_HRRL go back]
 
  
−
 
−
==041212==
 
−
 
−
 
−
*NaI detector,
 
−
* 300 mV threshold on gate channel
 
−
* signal ADC4
 
−
*-1030V at the beginning
 
−
*-1055V at the end of run
 
−
 
−
 
−
 
−
{| border="1" cellspacing="0" style="text-align: center; width: 1000px "
 
−
! scope="col" width="8%" | Run #
 
−
! scope="col" width="15%" | source
 
−
! scope="col" width="15%" | shielding
 
−
! scope="col" width="8%" | cnts
 
−
! scope="col" width="8%" | rate
 
−
! scope="col" width="66%" | Comments
 
−
|-
 
−
|2775||Co-60 away from NaI  ||2" Pb around, no front shielding ||133,884 || ||
 
−
|-
 
−
|2776||bkgd                  ||2" Pb around, no front shielding ||7,289  || ||
 
−
|-
 
−
|2777||Co-60 infront of NaI  ||2" Pb around, no front shielding ||313,427 || 
 
−
|align="left"|1.2 and 1.4 MeV peaks, small peak around 4.3 MeV
 
−
Calibration 1.4 MeV/575 cnls = 0.00243 MeV/cnl
 
−
|-
 
−
|2778||bkgd||2" Pb around, no front  ||15,822    ||41.75 Hz ||
 
−
|-
 
−
|2779||bkgd||all around 2" Pb around ||8,566    ||15.74 Hz ||align="left"|good area around 2000-3800 channels
 
−
|-
 
−
|2780||Cf252||all around 2" Pb around||          ||12 kHz ||align="left"|Cf252 just in front of NaI
 
−
|-
 
−
|2781||Cf252||all around 2" Pb around||          ||5.4 kHz ||align="left"|Cf252 about 15 cm away from NaI
 
−
|-
 
−
|2782||Cf252||all around 2" Pb around||607,790  ||1.1 kHz ||align="left"|Cf252 17" away from NaI
 
−
|-
 
−
|2784||Cf252||all around 2" Pb around||1,372,745 ||1,142 Hz ||align="left"|20 min run. No shielding in front
 
−
|-
 
−
|2785||Cf252||all around 2" Pb around||153,508  ||129.5 Hz ||align="left"|20 min run. 2" Pb just after Cf252
 
−
|-
 
−
|2787||Cf252||all around 2" Pb around||1,231,537 ||1,024 Hz ||align="left"|20 min run. 2" Borated Poly just after Cf252
 
−
|-
 
−
|2788||Cf252||all around 2" Pb around||1,225,232 ||1,020 Hz ||align="left"|20 min run. 2" Unborated Poly just after Cf252
 
−
|-
 
−
|2790||Cf252||all around 2" Pb around||132,067  ||111.6 Hz ||align="left"|20 min run. 2" Pb, 2" Borated Poly just after Cf252
 
−
|-
 
−
|2791||Cf252||all around 2" Pb around||108,603  ||89.6 Hz ||align="left"|20 min run. 4" Pb just after Cf252
 
−
|-
 
−
|2792||bkgd ||all around 2" Pb around||45,904    ||25.04 Hz ||align="left"|20 min run. background checking
 
−
 
−
|}
 
−
 
−
 
−
* rise time of NaI 50 ns
 
−
* decay time of NaI 3 us
 
−
 
−
 
−
*run 2784: Cf252 no shielding infront. 1,372,745 events
 
−
[[File:Cf no shielding infront.png | 700px]]
 
−
 
−
*run 2787: Cf252 2" Borated Poly infront. 1,231,537 events
 
−
[[File:Cf 2inchBoratedPoly infront.png | 700px]]
 
−
 
−
*run 2788: Cf252 2" Unborated Poly infront. 1,225,232 events
 
−
[[File:Cf 2inchUnBoratedPoly infront.png | 700px]]
 
−
 
−
*run 2792: background checking. 45,904 events
 
−
[[File:Background.png | 700px]]
 
−
 
−
*run 2785: Cf252 2" Pb infront. 153,508 events
 
−
[[File:Cf 2inchPb shlng infront.png | 700px]]
 
−
 
−
*run 2790: Cf252 2" Pb + 2" Borated Poly infront. 132,067 events
 
−
[[File:Cf 2inchBoratedPoly 2inchPb.png | 700px]]
 
−
 
−
*run 2791: Cf252 4" Pb infront. 108,603 events
 
−
[[File:Cf 4inchPb shlng infront.png | 700px]]
 
−
 
−
==041312==
 
−
 
−
*NaI detector,
 
−
* 300 mV threshold on gate channel
 
−
* signal ADC4
 
−
*-1036V switched to modern power supply
 
−
 
−
 
−
{| border="1" cellspacing="0" style="text-align: center; width: 1000px "
 
−
! scope="col" width="8%"  | Run #
 
−
! scope="col" width="8%"  | source
 
−
! scope="col" width="8%"  | cnts
 
−
! scope="col" width="8%"  | rate
 
−
! scope="col" width="68%" | Comments
 
−
|-
 
−
|2793||bkg  ||      ||     
 
−
|align="left"|detector + 2" Pb around + 2" Poly around
 
−
|-
 
−
|2794||Cf252 ||      ||1.24 Hz     
 
−
|align="left"|new power supply N471 CAEN, -1035V<br>
 
−
Cf252 17 inch away from detector<br>
 
−
Al around the NaI + borated shielding (not infront)<br>
 
−
DAQ crashed
 
−
|-
 
−
|2795||Cf252 ||55,458  ||88.23 Hz     
 
−
|align="left"|4" Pb infront of Cf252 + Al around and inside the shilding
 
−
|-
 
−
|2796||Cf252 ||130,122 ||79.23 Hz     
 
−
|align="left"|27 min, looking for (n,gamma) capture effect, 10B -> 4.44 MeV (100%)
 
−
geometry: Cf252 -> bored Poly -> 2" Al  ----> NaI
 
−
|-
 
−
|2797||Cf252 ||80,763  ||81.79 Hz     
 
−
|align="left"|geometry: Cf252 -> bored Poly ->  ----> NaI
 
−
|-
 
−
|2798||Cf252 ||134,725 ||95.38 Hz     
 
−
|align="left"|geometry: no Boron but Al is still in
 
−
23 min
 
−
|-
 
−
 
−
|2799||bkg  ||21,6941  ||37.86 Hz     
 
−
|align="left"|background long 108 min run
 
−
detector + 2" Pb around (except on the top of detector was 2" Al) + 2" Poly around
 
−
|-
 
−
|2800||bkg  ||      ||     
 
−
|align="left"|background long run
 
−
detector + 2" Pb around + 4" Poly borated and unborated around, no Al inside
 
−
|-
 
−
|}
 
−
 
−
 
−
[[File:Bkg.png |500px]]
 
−
[[File:Cf252 Al aroundandIn.png |500px]]
 
−
 
−
[[File:Cf252 4inPb Al aroundandIn.png |500px]]
 
−
[[File:Cf252 5inPb Al aroundandIn smallBin.png |500px]]
 
−
 
−
[[File:Cf252 5inPb Al aroundandIn wholeBin.png |500px]]
 
−
[[File:Cf252 5inPb Al aroundandIn noBin.png |500px]]
 
−
 
−
 
−
 
−
*run 2799
 
−
[[File:Background run.png | 500px]]
 
−
 
−
*run 2800
 

Latest revision as of 16:01, 17 April 2012

Retrieved from "https://wiki.iac.isu.edu/index.php?title=Cf252_NaI_detector_test._12_Apr_2012&oldid=73345"