CH He3 Attenuation Measurements Revisited

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Initial Experiments

CH PAS He3 Poly Boration Study

CH He3 Pre-amp Noise Investigation

Experimental Setup

Detector is mounted on 3D printed stands located at each end of the 20" He3 tube

The stands are ABS plastic

The entire setup is on top of BorAl plating placed on top of a plywood workbench

Front face of poly structure is 9.5" to closest part of detector tube

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

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 #1

Performed on the morning 2/24/22

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

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

  • The fan in/out is used to duplicate the pulse to run multiple discriminators & timers concurrently

CAEN Discriminator Model N841 Tag #113

  • 255mV threshold
  • Pulse width as measured on scope: 43ns

Ortec Spec Amp Model 672

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

CAEN Dual Timer Model N93B Tag #1761

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

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

Attenuation Measurements

Open Source

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 2621 100
2 Detector on 3D printed stands at +1250V 255 Yes 2582 100
3 Detector on 3D printed stands at +1250V 255 Yes 2497 100
4 Detector on 3D printed stands at +1250V 255 Yes 2605 100
5 Detector on 3D printed stands at +1250V 255 Yes 2522 100

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 368 100
2 Detector on 3D printed stands at +1250V 255 Yes 410 100
3 Detector on 3D printed stands at +1250V 255 Yes 406 100
4 Detector on 3D printed stands at +1250V 255 Yes 412 100
5 Detector on 3D printed stands at +1250V 255 Yes 412 100

2" Green poly (one brick)

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 430 100
2 Detector on 3D printed stands at +1250V 255 Yes 431 100
3 Detector on 3D printed stands at +1250V 255 Yes 407 100
4 Detector on 3D printed stands at +1250V 255 Yes 417 100
5 Detector on 3D printed stands at +1250V 255 Yes 411 100

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 264 100
2 Detector on 3D printed stands at +1250V 255 Yes 257 100
3 Detector on 3D printed stands at +1250V 255 Yes 274 100
4 Detector on 3D printed stands at +1250V 255 Yes 249 100
5 Detector on 3D printed stands at +1250V 255 Yes 261 100

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 291 100
2 Detector on 3D printed stands at +1250V 255 Yes 274 100
3 Detector on 3D printed stands at +1250V 255 Yes 299 100
4 Detector on 3D printed stands at +1250V 255 Yes 326 100
5 Detector on 3D printed stands at +1250V 255 Yes 274 100

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 242 100
2 Detector on 3D printed stands at +1250V 255 Yes 251 100
3 Detector on 3D printed stands at +1250V 255 Yes 247 100
4 Detector on 3D printed stands at +1250V 255 Yes 268 100
5 Detector on 3D printed stands at +1250V 255 Yes 243 100

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 225 100
2 Detector on 3D printed stands at +1250V 255 Yes 228 100
3 Detector on 3D printed stands at +1250V 255 Yes 210 100
4 Detector on 3D printed stands at +1250V 255 Yes 228 100
5 Detector on 3D printed stands at +1250V 255 Yes 222 100

Repeat of Initial Experimental Setup #2

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

CAEN Discriminator Model N841 Tag #115

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

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

Scope Images

Background Measurements

2/24/22 ~7:30am

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 100
2 Detector on poly at +1250V 255 No 100
3 Detector on poly at +1250V 255 No 100
4 Detector on poly at +1250V 255 No 100
5 Detector on poly at +1250V 255 No 100

Attenuation Measurements

Open Source

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

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

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

  • The fan in/out is used to duplicate the pulse to run multiple discriminators & timers concurrently

Lecroy Discriminator Model 821 Serial #B16303

  • 255mV threshold
  • Pulse width as measured on scope: 43ns

Ortec Spec Amp Model 672

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

CAEN Dual Timer Model N93B Tag #1572

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

Scope Images

  • Yellow: CAEN Dual Timer using Lecroy Disc as input. 100ns pulse width. Aqua: Lecroy Disc Output. ~43ns pulse width.

  • Purple: CAEN Dual Timer using Lecroy Disc as input. 100ns pulse width. Aqua: Lecroy Disc Output. 20ns pulse width. Lime:: Ortec Spec Amp 672 output.

  • Aqua: Lecroy Disc Output. ~43ns pulse width. Yellow: CAEN Dual Timer using Lecroy Disc as input. 100ns pulse width. Purple: CAEN Disc Output. ~43ns pulse width. Lime:: CAEN Dual Timer using CAEN Disc as input. 100ns pulse width.

Background Measurements

2/23/22 ~4pm

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

2/24/22 ~7:30am

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 59 100
2 Detector on 3D printed stands at +1250V 255 No 41 100
3 Detector on 3D printed stands at +1250V 255 No 57 100
4 Detector on 3D printed stands at +1250V 255 No 56 100
5 Detector on 3D printed stands at +1250V 255 No 55 100

Poly Attenuation Measurements

Open Source

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 2456 100
2 Detector on 3D printed stands at +1250V 255 Yes 2399 100
3 Detector on 3D printed stands at +1250V 255 Yes 2329 100
4 Detector on 3D printed stands at +1250V 255 Yes 2459 100
5 Detector on 3D printed stands at +1250V 255 Yes 2358 100

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 339 100
2 Detector on 3D printed stands at +1250V 255 Yes 381 100
3 Detector on 3D printed stands at +1250V 255 Yes 375 100
4 Detector on 3D printed stands at +1250V 255 Yes 376 100
5 Detector on 3D printed stands at +1250V 255 Yes 374 100

2" Green poly (one brick)

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 388 100
2 Detector on 3D printed stands at +1250V 255 Yes 403 100
3 Detector on 3D printed stands at +1250V 255 Yes 382 100
4 Detector on 3D printed stands at +1250V 255 Yes 387 100
5 Detector on 3D printed stands at +1250V 255 Yes 391 100

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 243 100
2 Detector on 3D printed stands at +1250V 255 Yes 239 100
3 Detector on 3D printed stands at +1250V 255 Yes 251 100
4 Detector on 3D printed stands at +1250V 255 Yes 230 100
5 Detector on 3D printed stands at +1250V 255 Yes 236 100

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 271 100
2 Detector on 3D printed stands at +1250V 255 Yes 255 100
3 Detector on 3D printed stands at +1250V 255 Yes 281 100
4 Detector on 3D printed stands at +1250V 255 Yes 299 100
5 Detector on 3D printed stands at +1250V 255 Yes 266 100

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 223 100
2 Detector on 3D printed stands at +1250V 255 Yes 231 100
3 Detector on 3D printed stands at +1250V 255 Yes 227 100
4 Detector on 3D printed stands at +1250V 255 Yes 245 100
5 Detector on 3D printed stands at +1250V 255 Yes 229 100

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 209 100
2 Detector on 3D printed stands at +1250V 255 Yes 211 100
3 Detector on 3D printed stands at +1250V 255 Yes 200 100
4 Detector on 3D printed stands at +1250V 255 Yes 208 100
5 Detector on 3D printed stands at +1250V 255 Yes 211 100

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

Plateau Measurements

1250V Plateau Measurements
Run Number Configuration Discriminator Threshold (mV) Cf-252 Source Counts Run Time (Sec) Count Rate (Hz) Uncertainty
1 Detector on poly blocks at +1250V 30 Yes 36048 100
2 Detector on poly blocks at +1250V 40 Yes 4614 100
3 Detector on poly blocks at +1250V 50 Yes 4175 100
4 Detector on poly blocks at +1250V 60 Yes 3989 100
5 Detector on poly blocks at +1250V 70 Yes 3932 100
6 Detector on poly blocks at +1250V 80 Yes 3969 100
7 Detector on poly blocks at +1250V 90 Yes 3757 100
8 Detector on poly blocks at +1250V 100 Yes 3795 100

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) Count Rate (Hz) Uncertainty
1 Detector on poly at +1250V 80 Yes 3873 100
2 Detector on poly at +1250V 80 Yes 3909 100
3 Detector on poly at +1250V 80 Yes 3859 100
4 Detector on poly at +1250V 80 Yes 3944 100
5 Detector on poly at +1250V 80 Yes 3812 100

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 764 100
2 Detector on poly at +1250V 80 Yes 819 100
3 Detector on poly at +1250V 80 Yes 818 100
4 Detector on poly at +1250V 80 Yes 815 100
5 Detector on poly at +1250V 80 Yes 913 100

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 486 100
2 Detector on poly at +1250V 80 Yes 509 100
3 Detector on poly at +1250V 80 Yes 531 100
4 Detector on poly at +1250V 80 Yes 544 100
5 Detector on poly at +1250V 80 Yes 530 100

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 100
2 Detector on poly at +1250V 80 Yes 100
3 Detector on poly at +1250V 80 Yes 100
4 Detector on poly at +1250V 80 Yes 100
5 Detector on poly at +1250V 80 Yes 100

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 100
2 Detector on poly at +1250V 80 Yes 100
3 Detector on poly at +1250V 80 Yes 100
4 Detector on poly at +1250V 80 Yes 100
5 Detector on poly at +1250V 80 Yes 100

Lead Attenuation Measurements

4/5/22

Lead Open Source

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 3873 100
2 Detector on poly at +1250V 80 Yes 3909 100
3 Detector on poly at +1250V 80 Yes 3859 100
4 Detector on poly at +1250V 80 Yes 3944 100
5 Detector on poly at +1250V 80 Yes 3812 100

1" Lead

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 4152 100
2 Detector on poly at +1250V 80 Yes 3945 100
3 Detector on poly at +1250V 80 Yes 4141 100
4 Detector on poly at +1250V 80 Yes 3974 100
5 Detector on poly at +1250V 80 Yes 4154 100

2" Lead

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 3509 100
2 Detector on poly at +1250V 80 Yes 3472 100
3 Detector on poly at +1250V 80 Yes 3387 100
4 Detector on poly at +1250V 80 Yes 3488 100
5 Detector on poly at +1250V 80 Yes 3463 100

3" Lead

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 2995 100
2 Detector on poly at +1250V 80 Yes 2921 100
3 Detector on poly at +1250V 80 Yes 2956 100
4 Detector on poly at +1250V 80 Yes 2916 100
5 Detector on poly at +1250V 80 Yes 3015 100

4" Lead

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 2630 100
2 Detector on poly at +1250V 80 Yes 2601 100
3 Detector on poly at +1250V 80 Yes 2558 100
4 Detector on poly at +1250V 80 Yes 2629 100
5 Detector on poly at +1250V 80 Yes 2650 100


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