Gain matching
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7/16/16
PMT top and bottom is in coincidence with a trigger placed 3" below the CF-252 source.
PMT pulses are widened to 500 ns in electronics in order to avoid double counting.
Discriminator thresholds:
Trigger: 35 mv
PMT's: 50 mv
| Detector | Count rate at -1700 V (Hz) | Difference | ||
|---|---|---|---|---|
| angle | color | Source in | Source out | |
| 30 | Red | 8.3 | 4.8 | 3.5 |
| 90 | Yellow | 2.4 | 0.6 | 1.8 |
| 150 | Blue | 3.7 | 1.67 | 2.0 |
| D225 | Wood | 1.2 | 0.4 | 0.6 |