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This is where I write down what I'm doing
1/13/23 : Turned on HpGe HV to 1500 and learned about analog to digital signal processing
detected signal rate -vs- HpGe Voltage
Cs-137 source on face of HpGe detector
| HV | Counts |
| 1492.67 | 1532.5 +/- 36.67 |
| 799.15 | 1336.5 +/- 2.121 |
| 396.83 | 1193.5 +/- 54.477 |
| 197.19 | 1035.5 +/- 40.305 |
| 4.88 | 562.5 +/- 2.121 |
NO source on face of HpGe detector
| HV | Counts |
| 1492.67 | 167.5 +/- 7.778 |
| 799.15 | 149.4 +/- 34.648 |
| 396.83 | 127.5 +/- 7.778 |
| 197.19 | 121 +/- 4.243 |
| 4.88 | 332 +/- 35.355 |
1/27/23 : Turned on He3 detector, adjusted to find counts with Cf source in containment and out of containment
2/3/23 : Same as 1/27, adjusting discriminator voltage and recording counts with Cf-252 source. Encountered strange effects of higher counts with source away at low QD voltage. Sets of measurements notably inconsistent.
HV on He3: 1208V
Amplifier Gain: 21.5
Counts/10s
He3 Tube
| Discriminator Voltage (V) | Counts/10s (with source) | Counts/10s (no source) |
|---|---|---|
| 2.003 | 4.4 ± 1.67 | 97.0 ± 8.49 |
| 1.788 | 4.8 ± 1.09 | 108.2 ± 10.89 |
| 1.503 | 5.4 ± 2.22 | 105.7 ± 8.63 |
| 1.227 | 7.9 ± 3.14 | 109.8 +± 9.34 |
| 1.009 | 89.9 ± 7.87 | 234.1 ± 20.06 |
| 0.799 | 2656 ± 251.1 | 2447 ± 183.0 |
| 0.485 | 55479 ± 1325 | 48360 ± 1938 |
Cf Source in containment to He3 detector
| HV | Counts |
2/10/23 Same procedure as 2/3/23, just changing HV applied to He3 detector to values of 1300V then 1100V.