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
