CH He3 Attenuation Measurements Revisited

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Experimental Setup

Polyethylene Structure

This section to include type of poly, location, source-detector distance, images, etc

Detector

Include images, model/serial number of detector, physical parameters, etc

Electronics Chain

Include schematic of electronics chain

He3 Tube Plateau

Measurements

1250V Source Out Data
Run Number Configuration Discriminator Threshold (mV) Cf-252 Source Counts Run Time (Sec) Count Rate (Hz)
1 Detector on 3D printed stands at +1250V 125 No 100
2 Detector on 3D printed stands at +1250V 145 No 100
3 Detector on 3D printed stands at +1250V 155 No 100
4 Detector on 3D printed stands at +1250V 160 No 100
5 Detector on 3D printed stands at +1250V 165 No 100
6 Detector on 3D printed stands at +1250V 170 No 100
7 Detector on 3D printed stands at +1250V 175 No 100
8 Detector on 3D printed stands at +1250V 185 No 100
9 Detector on 3D printed stands at +1250V 205 No 100
10 Detector on 3D printed stands at +1250V 225 No 100
11 Detector on 3D printed stands at +1250V 245 No 100
12 Detector on 3D printed stands at +1250V 255 No 100
1250V Source In Data
Run Number Configuration Discriminator Threshold (mV) Cf-252 Source Counts Run Time (Sec) Count Rate (Hz)
1 Detector on 3D printed stands at +1250V 125 Yes 100
2 Detector on 3D printed stands at +1250V 145 Yes 100
3 Detector on 3D printed stands at +1250V 155 Yes 100
4 Detector on 3D printed stands at +1250V 160 Yes 100
5 Detector on 3D printed stands at +1250V 165 Yes 100
6 Detector on 3D printed stands at +1250V 170 Yes 100
7 Detector on 3D printed stands at +1250V 175 Yes 100
8 Detector on 3D printed stands at +1250V 185 Yes 100
9 Detector on 3D printed stands at +1250V 205 Yes 100
10 Detector on 3D printed stands at +1250V 225 Yes 100
11 Detector on 3D printed stands at +1250V 245 Yes 100
12 Detector on 3D printed stands at +1250V 255 Yes 100
Plateau Plots
Plateau measurements at 700V, source in and source out overlaid.
Plateau measurements at 700V, source in minus source out.
Signal to Noise ratio for 700V at different discriminator voltages

Repeat of Initial Experimental Setup

Experimental Setup

Polyethylene Structure

This section to include type of poly, location, source-detector distance, images, etc

Detector

Include images, model/serial number of detector, physical parameters, etc

Electronics Chain

Include schematic of electronics chain

Components

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

Measurements

1" Green poly

1250V source in
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 Yes 100
2 Detector on 3D printed stands at +1250V 255 Yes 100
3 Detector on 3D printed stands at +1250V 255 Yes 100
4 Detector on 3D printed stands at +1250V 255 Yes 100
5 Detector on 3D printed stands at +1250V 255 Yes 100

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 3D printed stands at +1250V 255 Yes 100
2 Detector on 3D printed stands at +1250V 255 Yes 100
3 Detector on 3D printed stands at +1250V 255 Yes 100
4 Detector on 3D printed stands at +1250V 255 Yes 100
5 Detector on 3D printed stands at +1250V 255 Yes 100

3" Green poly (one brick & sheet)

1250V source in
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 Yes 100
2 Detector on 3D printed stands at +1250V 255 Yes 100
3 Detector on 3D printed stands at +1250V 255 Yes 100
4 Detector on 3D printed stands at +1250V 255 Yes 100
5 Detector on 3D printed stands at +1250V 255 Yes 100

4" Green poly (two bricks)

1250V source in
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 Yes 100
2 Detector on 3D printed stands at +1250V 255 Yes 100
3 Detector on 3D printed stands at +1250V 255 Yes 100
4 Detector on 3D printed stands at +1250V 255 Yes 100
5 Detector on 3D printed stands at +1250V 255 Yes 100

6" Green poly (three bricks)

1250V source in
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 Yes 100
2 Detector on 3D printed stands at +1250V 255 Yes 100
3 Detector on 3D printed stands at +1250V 255 Yes 100
4 Detector on 3D printed stands at +1250V 255 Yes 100
5 Detector on 3D printed stands at +1250V 255 Yes 100

8" Green poly (four bricks)

1250V source in
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 Yes 100
2 Detector on 3D printed stands at +1250V 255 Yes 100
3 Detector on 3D printed stands at +1250V 255 Yes 100
4 Detector on 3D printed stands at +1250V 255 Yes 100
5 Detector on 3D printed stands at +1250V 255 Yes 100

Attenuation Experiment using HPGe Lynx System as PSU/DAQ

Experimental Setup

Polyethylene Structure

This section to include type of poly, location, source-detector distance, images, etc

Detector

Include images, model/serial number of detector, physical parameters, etc

Electronics Chain

Include schematic of electronics chain

Components

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

Measurements

Attenuation Experiment using New Modules in Electronics Chain

Experimental Setup

Polyethylene Structure

This section to include type of poly, location, source-detector distance, images, etc

Detector

Include images, model/serial number of detector, physical parameters, etc

Electronics Chain

Include schematic of electronics chain

Components

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

Lecroy Discriminator Model 821

  • 255mV threshold
  • Pulse width as measured on scope: 20ns

Ortec Spec Amp Model 672

  • 10x Course Gain
  • 1x Fine Gain
  • 2us Shaping Time
  • Uni Shaping: Gaussian
  • Input: Norm (-)
  • Output: Unipolar

Dual Timer

  • Discriminator output used to start timer
  • Timer output used to trigger scalar
  • Pulse width as measured on scope: 100ns

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 poly at +1250V 255 No 63 100
2 Detector on poly at +1250V 255 No 52 100
3 Detector on poly at +1250V 255 No 65 100
4 Detector on poly at +1250V 255 No 53 100
5 Detector on poly at +1250V 255 No 70 100



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CaGaS Phase II

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