Difference between revisions of "Experimental setup"

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[[Image:exp_setup1.jpg]]
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Collimator parameters: in upstream side of wall 1/2", in downstream side of wall 1(1/2)".
  
\Delta T
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[[Image:whole_exp_setup.jpg]]
  
[[Image:exp_setup2.jpg]]
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'''Figure 0''': sketch of experimental setup.
  
[[Image:exp_setup3.jpg]]
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[[Image:exp_setup1_1.jpg]]
  
[[Image:exp_setup4.jpg]]
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'''Figure 1''': 8:21 am - <math>40 mAmps</math> pulse, 200 ns, 300 Hz, <math>10^3 secs</math> of beam, 6 fissions. 9:10 am - Threshold 80 mV, <math>N_{T1} = 17.6 counts/10 min</math>.
  
[[Image:exp_setup5.jpg]]
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[[Image:exp_setup2_2.jpg]]
  
[[Image:exp_setup6.jpg]]
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'''Figure 2''': <math>\Delta T = 200 ns</math>, <math>I_e = 40 mA</math>, <math>f = 300 Hz</math>, <math>E_e = 20 MeV</math>, <math>q = 8.7 nC/pulse</math>. <math>N_{T1} = 12 counts/10 min</math>, <math>N_{T2} = 35 counts/10 min</math>.
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Geometrical dimensions for detector placement and chamber size are the same as in Figure 1.
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[[Image:exp_setup3_2.jpg]]
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'''Figure 3''': <math>\Delta T = 200 ns</math>, <math>I_e = 40 mA</math>, <math>f = 300 Hz</math>, <math>E_e = 20 MeV</math>, <math>q = 8.7 nC/pulse</math>. <math>N_{T2} = 46 counts/10 min</math>, threshold = 80 mV, <math>P_B = 33.9</math>. Geometrical dimensions for detector placement and chamber size are the same as in Figure 1.
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[[Image:exp_setup4_2.jpg]]
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'''Figure 4''': <math>\Delta T = 200 ns</math>, <math>I_e = 40 mA</math>, <math>f = 300 Hz</math>, <math>E_e = 20 MeV</math>, <math>q = 8.7 nC/pulse</math>. <math>N_{T2} \sim 48 counts/10 min</math>, <math>N_{T1} (thresh = 30 mV, beam on) = 1065 counts/10 min</math>, threshold = 80 mV, <math>P_B = 33.9</math>. Geometrical dimensions for detector placement and chamber size are the same as in Figure 1.
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[[Image:exp_setup5_2.jpg]]
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'''Figure 4''': This new architecture is used for obtaining timing spectra during runs 60 - 63 (http://www.iac.isu.edu/mediawiki/index.php/Timing_spectra), <math>P_B = 3.97 Torr</math>, <math>P_C = 4.5 Torr</math>.
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[[Image:exp_setup6_2.jpg]]
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'''Figure 5''': Beam produces nuclear fragments on <math>C^{12}</math> and Al and fission fragments on <math>U^{235}</math>. P = 4.96 Torr (heptane), <math>N_{T1} \sim 4.6/100 sec</math> (beam off), <math>N_{T1} \sim 2.75/100 sec</math> (beam on!). Chambers are not stable due to vacuum leak.
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If nothing was changed this geometry was used to get all the energy spectra (http://www.iac.isu.edu/mediawiki/index.php/Energy_spectra_%28fiss_frag%29).
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[[Image:results_for_setup6.jpg]]
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'''Figure 6''': ADC distributions of <math>T_2</math> (left) and <math>T_1</math> (right). Data obtained via experimental setup shown in Figure 5.

Latest revision as of 10:38, 25 August 2008

Collimator parameters: in upstream side of wall 1/2", in downstream side of wall 1(1/2)".

Whole exp setup.jpg

Figure 0: sketch of experimental setup.

Exp setup1 1.jpg

Figure 1: 8:21 am - [math]40 mAmps[/math] pulse, 200 ns, 300 Hz, [math]10^3 secs[/math] of beam, 6 fissions. 9:10 am - Threshold 80 mV, [math]N_{T1} = 17.6 counts/10 min[/math].

Exp setup2 2.jpg

Figure 2: [math]\Delta T = 200 ns[/math], [math]I_e = 40 mA[/math], [math]f = 300 Hz[/math], [math]E_e = 20 MeV[/math], [math]q = 8.7 nC/pulse[/math]. [math]N_{T1} = 12 counts/10 min[/math], [math]N_{T2} = 35 counts/10 min[/math]. Geometrical dimensions for detector placement and chamber size are the same as in Figure 1.

Exp setup3 2.jpg

Figure 3: [math]\Delta T = 200 ns[/math], [math]I_e = 40 mA[/math], [math]f = 300 Hz[/math], [math]E_e = 20 MeV[/math], [math]q = 8.7 nC/pulse[/math]. [math]N_{T2} = 46 counts/10 min[/math], threshold = 80 mV, [math]P_B = 33.9[/math]. Geometrical dimensions for detector placement and chamber size are the same as in Figure 1.


Exp setup4 2.jpg

Figure 4: [math]\Delta T = 200 ns[/math], [math]I_e = 40 mA[/math], [math]f = 300 Hz[/math], [math]E_e = 20 MeV[/math], [math]q = 8.7 nC/pulse[/math]. [math]N_{T2} \sim 48 counts/10 min[/math], [math]N_{T1} (thresh = 30 mV, beam on) = 1065 counts/10 min[/math], threshold = 80 mV, [math]P_B = 33.9[/math]. Geometrical dimensions for detector placement and chamber size are the same as in Figure 1.


Exp setup5 2.jpg

Figure 4: This new architecture is used for obtaining timing spectra during runs 60 - 63 (http://www.iac.isu.edu/mediawiki/index.php/Timing_spectra), [math]P_B = 3.97 Torr[/math], [math]P_C = 4.5 Torr[/math].

Exp setup6 2.jpg

Figure 5: Beam produces nuclear fragments on [math]C^{12}[/math] and Al and fission fragments on [math]U^{235}[/math]. P = 4.96 Torr (heptane), [math]N_{T1} \sim 4.6/100 sec[/math] (beam off), [math]N_{T1} \sim 2.75/100 sec[/math] (beam on!). Chambers are not stable due to vacuum leak. If nothing was changed this geometry was used to get all the energy spectra (http://www.iac.isu.edu/mediawiki/index.php/Energy_spectra_%28fiss_frag%29).

Results for setup6.jpg

Figure 6: ADC distributions of [math]T_2[/math] (left) and [math]T_1[/math] (right). Data obtained via experimental setup shown in Figure 5.