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
I will be performing background runs overnight due to the low amount of background counts. This is necessary to get an acceptable level of uncertainty in the measurements as the count rate looks to be on the order of .5Hz.
The first run background run is taking place the evening of 6/25/21 and will end the following day.
| 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 |
|
|
|
|
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 |
236 |
300 |
|
|
| 2 |
Detector on BorAl at +1250V |
255 |
Yes |
263 |
60 |
|
|
| 3 |
Detector on BorAl at +1250V |
255 |
Yes |
251 |
60 |
|
|
| 4 |
Detector on BorAl at +1250V |
255 |
Yes |
203 |
60 |
|
|
| 5 |
Detector on BorAl at +1250V |
255 |
Yes |
218 |
60 |
|
|
Source In with Thermalizer
Thermalizer, no borated poly, & 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 |
|
300 |
|
|
| 2 |
Detector on BorAl at +1250V |
255 |
Yes |
|
60 |
|
|
| 3 |
Detector on BorAl at +1250V |
255 |
Yes |
|
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 (one sheet), no thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
2" Green poly (one brick) no thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
154 |
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
163 |
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
150 |
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
125 |
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
154 |
300 |
|
|
3" Green poly (one brick & sheet) no thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
4" Green poly (two bricks) no thermalizer
These measurements need to be redone as <100 counts is higher than 10% uncertainty
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
74 |
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
65 |
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
71 |
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
61 |
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
600 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
600 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
600 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
600 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
600 |
|
|
6" Green poly (three bricks) no thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
8" Green poly (four bricks) no thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
Green Poly with Thermalizer
1" Green poly, with thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
2" Green poly (one brick) with thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
3" Green poly (one brick & sheet) with thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
4" Green poly (two bricks) with thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
6" Green poly (three bricks) with thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
8" Green poly (four bricks) with thermalizer
| 1250V source in |
|
| Run Number |
Configuration |
Discriminator Threshold (mV) |
Cf-252 Source |
Counts |
Run Time (Sec) |
Count Rate (Hz) |
Uncertainty
|
| 1 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 2 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 3 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 4 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
| 5 |
Detector on poly at +1250V |
255 |
Yes |
|
300 |
|
|
Go Back
CH He3 Attenuation Measurements
PAS Experiment Attenuation Measurements
PAS_He3_Detector
PAS_Experiment
