Difference between revisions of "CH PAS He3 BorAl Attenuation Study"

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Line 47: Line 47:
 
|  2  || Detector on BorAl at +1250V || 255 || Yes || 220 || 60 ||  ||
 
|  2  || Detector on BorAl at +1250V || 255 || Yes || 220 || 60 ||  ||
 
|-
 
|-
−
|  3  || Detector on BorAl at +1250V || 255 || Yes || || 60 ||  ||
+
|  3  || Detector on BorAl at +1250V || 255 || Yes || 199 || 60 ||  ||
 
|-
 
|-
 
|  4  || Detector on BorAl at +1250V || 255 || Yes ||  || 60 ||  ||
 
|  4  || Detector on BorAl at +1250V || 255 || Yes ||  || 60 ||  ||
Line 55: Line 55:
 
|}
 
|}
  
 +
=='''Green Poly without Thermalizer'''==
 +
 +
==='''1" Green poly, no thermalizer'''===
 +
 +
{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| '''1250V source in'''||
 +
|-
 +
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
 +
|-
 +
|  1  || Detector on poly at +1250V || 255 || Yes || 2566 || 300 || 8.55 || 0.169
 +
|-
 +
|  2  || Detector on poly at +1250V || 255 || Yes || 2627 || 300 || 8.76 || 0.171
 +
|-
 +
|  3  || Detector on poly at +1250V || 255 || Yes || 2559 || 300 || 8.53 || 0.169
 +
|-
 +
|  4  || Detector on poly at +1250V || 255 || Yes || 2562 || 300 || 8.54 || 0.169
 +
|-
 +
|  5  || Detector on poly at +1250V || 255 || Yes || 2660 || 300 || 8.87 || 0.172
 +
|-
 +
|}
 +
 +
==='''2" Green poly (one brick) no thermalizer'''===
 +
 +
{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| '''1250V source in'''||
 +
|-
 +
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
 +
|-
 +
|  1  || Detector on poly at +1250V || 255 || Yes || 2176 || 300 || 7.25 || 0.155
 +
|-
 +
|  2  || Detector on poly at +1250V || 255 || Yes || 2070 || 300 || 6.90 || 0.152
 +
|-
 +
|  3  || Detector on poly at +1250V || 255 || Yes || 2055 || 300 || 6.85 || 0.151
 +
|-
 +
|  4  || Detector on poly at +1250V || 255 || Yes || 2131 || 300 || 7.10 || 0.154
 +
|-
 +
|  5  || Detector on poly at +1250V || 255 || Yes || 1957 || 300 || 6.52 || 0.147
 +
|-
 +
|}
 +
 +
==='''3" Green poly (one brick & sheet) no thermalizer'''===
 +
 +
{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| '''1250V source in'''||
 +
|-
 +
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
 +
|-
 +
|  1  || Detector on poly at +1250V || 255 || Yes || 1345 || 300 || 4.48 || 0.122
 +
|-
 +
|  2  || Detector on poly at +1250V || 255 || Yes || 1335 || 300 || 4.45 || 0.122
 +
|-
 +
|  3  || Detector on poly at +1250V || 255 || Yes || 1295 || 300 || 4.32 || 0.120
 +
|-
 +
|  4  || Detector on poly at +1250V || 255 || Yes || 1384 || 300 || 4.61 || 0.124
 +
|-
 +
|  5  || Detector on poly at +1250V || 255 || Yes || 1297 || 300 || 4.32 || 0.120
 +
|-
 +
|}
 +
 +
==='''4" Green poly (two bricks) no thermalizer'''===
 +
 +
{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| '''1250V source in'''||
 +
|-
 +
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
 +
|-
 +
|  1  || Detector on poly at +1250V || 255 || Yes || 1056 || 300 || 3.52 || 0.108
 +
|-
 +
|  2  || Detector on poly at +1250V || 255 || Yes || 1085 || 300 || 3.62 || 0.110
 +
|-
 +
|  3  || Detector on poly at +1250V || 255 || Yes || 1151 || 300 || 3.84 || 0.113
 +
|-
 +
|  4  || Detector on poly at +1250V || 255 || Yes || 1064 || 300 || 3.55 || 0.109
 +
|-
 +
|  5  || Detector on poly at +1250V || 255 || Yes || 1059 || 300 || 3.53 || 0.108
 +
|-
 +
|}
 +
 +
==='''6" Green poly (three bricks) no thermalizer'''===
 +
 +
{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| '''1250V source in'''||
 +
|-
 +
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
 +
|-
 +
|  1  || Detector on poly at +1250V || 255 || Yes || 728 || 300 || 2.43 || 0.090
 +
|-
 +
|  2  || Detector on poly at +1250V || 255 || Yes || 737 || 300 || 2.46 || 0.090
 +
|-
 +
|  3  || Detector on poly at +1250V || 255 || Yes || 759 || 300 || 2.53 || 0.092
 +
|-
 +
|  4  || Detector on poly at +1250V || 255 || Yes || 717 || 300 || 2.39 || 0.089
 +
|-
 +
|  5  || Detector on poly at +1250V || 255 || Yes || 764 || 300 || 2.55 || 0.092
 +
|-
 +
|}
 +
 +
==='''8" Green poly (four bricks) no thermalizer'''===
 +
 +
{| class="wikitable mw-collapsible mw-collapsed" border="2" style="text-align:center;" |cellpadding="20" cellspacing="1
 +
|-
 +
| '''1250V source in'''||
 +
|-
 +
|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Button Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
 +
|-
 +
|  1  || Detector on poly at +1250V || 255 || Yes || 612 || 300 || 2.04 || 0.082
 +
|-
 +
|  2  || Detector on poly at +1250V || 255 || Yes || 606 || 300 || 2.02 || 0.082
 +
|-
 +
|  3  || Detector on poly at +1250V || 255 || Yes || 582 || 300 || 1.94 || 0.080
 +
|-
 +
|  4  || Detector on poly at +1250V || 255 || Yes || 606 || 300 || 2.04 || 0.082
 +
|-
 +
|  5  || Detector on poly at +1250V || 255 || Yes || 597 || 300 || 1.99 || 0.081
 +
|-
 +
|}
  
  

Revision as of 22:42, 25 June 2021

Experimental Setup

Attenuation Measurements Setup
Poly box to contain Cf-252 source for attenuation measurements
 [[File:|400px|thumb|none|He3 tube mounting for attenuation measurements ]] [[File: |300px|thumb|none| ]]
[[File:|300px|thumb|none| ]]
Top down view of Cf-252 source in place, ready to be covered by top sheet of virgin poly
 [[File: |300px|thumb|none| ]]

Measurements

Background Measurements

1250V Source Out Data
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on BorAl at +1250V 255 No 60
2 Detector on BorAl at +1250V 255 No 60
3 Detector on BorAl at +1250V 255 No 60
4 Detector on BorAl at +1250V 255 No 60
5 Detector on BorAl at +1250V 255 No 60

Source In

No thermalizer, no borated poly, just BorAl shielding around detector

1250V Source In Data
Run Number Configuration Discriminator Threshold (mV) Cf-252 Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on BorAl at +1250V 255 Yes 231 300
2 Detector on BorAl at +1250V 255 Yes 220 60
3 Detector on BorAl at +1250V 255 Yes 199 60
4 Detector on BorAl at +1250V 255 Yes 60
5 Detector on BorAl at +1250V 255 Yes 60

Green Poly without Thermalizer

1" Green poly, no thermalizer

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 255 Yes 2566 300 8.55 0.169
2 Detector on poly at +1250V 255 Yes 2627 300 8.76 0.171
3 Detector on poly at +1250V 255 Yes 2559 300 8.53 0.169
4 Detector on poly at +1250V 255 Yes 2562 300 8.54 0.169
5 Detector on poly at +1250V 255 Yes 2660 300 8.87 0.172

2" Green poly (one brick) no thermalizer

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 255 Yes 2176 300 7.25 0.155
2 Detector on poly at +1250V 255 Yes 2070 300 6.90 0.152
3 Detector on poly at +1250V 255 Yes 2055 300 6.85 0.151
4 Detector on poly at +1250V 255 Yes 2131 300 7.10 0.154
5 Detector on poly at +1250V 255 Yes 1957 300 6.52 0.147

3" Green poly (one brick & sheet) no thermalizer

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 255 Yes 1345 300 4.48 0.122
2 Detector on poly at +1250V 255 Yes 1335 300 4.45 0.122
3 Detector on poly at +1250V 255 Yes 1295 300 4.32 0.120
4 Detector on poly at +1250V 255 Yes 1384 300 4.61 0.124
5 Detector on poly at +1250V 255 Yes 1297 300 4.32 0.120

4" Green poly (two bricks) no thermalizer

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 255 Yes 1056 300 3.52 0.108
2 Detector on poly at +1250V 255 Yes 1085 300 3.62 0.110
3 Detector on poly at +1250V 255 Yes 1151 300 3.84 0.113
4 Detector on poly at +1250V 255 Yes 1064 300 3.55 0.109
5 Detector on poly at +1250V 255 Yes 1059 300 3.53 0.108

6" Green poly (three bricks) no thermalizer

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 255 Yes 728 300 2.43 0.090
2 Detector on poly at +1250V 255 Yes 737 300 2.46 0.090
3 Detector on poly at +1250V 255 Yes 759 300 2.53 0.092
4 Detector on poly at +1250V 255 Yes 717 300 2.39 0.089
5 Detector on poly at +1250V 255 Yes 764 300 2.55 0.092

8" Green poly (four bricks) no thermalizer

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Button Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 255 Yes 612 300 2.04 0.082
2 Detector on poly at +1250V 255 Yes 606 300 2.02 0.082
3 Detector on poly at +1250V 255 Yes 582 300 1.94 0.080
4 Detector on poly at +1250V 255 Yes 606 300 2.04 0.082
5 Detector on poly at +1250V 255 Yes 597 300 1.99 0.081












CH He3 Attenuation Measurements

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