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

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Revision as of 23:48, 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

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, 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

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) 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

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