Difference between revisions of "CH He3 Attenuation Measurements: 3 Different Cf252 Sources"

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|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Source || Counts || Run Time (Sec) || Count Rate (Hz) || Uncertainty
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|  Run Number || Configuration || Discriminator Threshold (mV) || Cf-252 Source || Counts || Run Time (Sec)
 
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|  1  || Detector on poly at +1250V || 80 || Yes || 34456 || 10 ||  ||
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|  1  || Detector on poly at +1250V || 80 || Yes || 34456 || 10  
 
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|  2  || Detector on poly at +1250V || 80 || Yes || 34920 || 10 ||  ||
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|  2  || Detector on poly at +1250V || 80 || Yes || 34920 || 10  
 
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|  3  || Detector on poly at +1250V || 80 || Yes || 34422 || 10 || ||
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|  3  || Detector on poly at +1250V || 80 || Yes || 34422 || 10   
 
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|  4  || Detector on poly at +1250V || 80 || Yes || 34007 || 10 ||  ||
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|  4  || Detector on poly at +1250V || 80 || Yes || 34007 || 10  
 
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|  5  || Detector on poly at +1250V || 80 || Yes || 34420 || 10 ||  ||
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|  5  || Detector on poly at +1250V || 80 || Yes || 34420 || 10  
 
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Revision as of 17:24, 9 June 2022

Attenuation Experiment using New Modules in Electronics Chain and Inside Borated Poly Box

Electronics Chain (Poly Box)

Include schematic of electronics chain

Components

Each component of electronics chain with make/model, function, and brief description of why it's present

Ortec 142PC Pre-amp

Pre-amp for the He3 tube

CAEN Quad Linear Fan In - Fan Out Model N25 Tag #15687

  • The fan in/out is used to duplicate the pulse to run the spec amp and watch the signal on the scope for any anomalies.
  • The fan in/out is also used to invert the signal from the spec amp to send a negative pulse to the discriminator to trigger the scalar.

Ortec Spec Amp Model 672

  • 10x Course Gain
  • 1x Fine Gain
  • 0.5us Shaping Time
  • Uni Shaping: Gaussian
  • Input: Norm (+)
  • Output: Unipolar
  • Manual Pole Zero adjustment

LeCroy Discriminator Model 821 Serial #B16303

  • Variable threshold
  • Pulse width as measured on scope: ~43ns

Scope Images

Background Measurements

1250V Background Measurements
Run Number Configuration Discriminator Threshold (mV) Cf-252 Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on 3D printed stands at +1250V 255 No 100
2 Detector on 3D printed stands at +1250V 255 No 100
3 Detector on 3D printed stands at +1250V 255 No 100
4 Detector on 3D printed stands at +1250V 255 No 100
5 Detector on 3D printed stands at +1250V 255 No 100

Poly Box Attenuation Measurements

Open Source

1250V source in
Run Number Configuration Discriminator Threshold (mV) Cf-252 Source Counts Run Time (Sec)
1 Detector on poly at +1250V 80 Yes 34456 10
2 Detector on poly at +1250V 80 Yes 34920 10
3 Detector on poly at +1250V 80 Yes 34422 10
4 Detector on poly at +1250V 80 Yes 34007 10
5 Detector on poly at +1250V 80 Yes 34420 10

2" Green poly (one brick) in Box

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 80 Yes 7538 10
2 Detector on poly at +1250V 80 Yes 7515 10
3 Detector on poly at +1250V 80 Yes 7613 10
4 Detector on poly at +1250V 80 Yes 7566 10
5 Detector on poly at +1250V 80 Yes 7510 10

4" Green poly (two bricks) in Box

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 80 Yes 4758 10
2 Detector on poly at +1250V 80 Yes 4798 10
3 Detector on poly at +1250V 80 Yes 4722 10
4 Detector on poly at +1250V 80 Yes 4859 10
5 Detector on poly at +1250V 80 Yes 4672 10

6" Green poly (three bricks) in Box

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 80 Yes 3664 10
2 Detector on poly at +1250V 80 Yes 3627 10
3 Detector on poly at +1250V 80 Yes 3699 10
4 Detector on poly at +1250V 80 Yes 3688 10
5 Detector on poly at +1250V 80 Yes 3500 10

8" Green poly (four bricks) in Box

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 80 Yes 3140 10
2 Detector on poly at +1250V 80 Yes 3064 10
3 Detector on poly at +1250V 80 Yes 3030 10
4 Detector on poly at +1250V 80 Yes 3095 10
5 Detector on poly at +1250V 80 Yes 3113 10


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CaGaS Phase II

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