2017/05/20 (Saturday)
| Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 | |
| PuBe source in paraffin barrel behind shield (west side) Na-22 source hanging along southeast column of fridge stand |
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| Took NaI-triggered data overnight @50V. Data looks good. | |
| 1400 | DCRC1 channel seems to have a little hair on the peaks |
| 1427 | fill LN2 trap |
| 1428 | leakage current at 2.28 mV , apparent voltage 51.1 V, dial down voltage for flashing |
| 1433 | begin 1 hr bake with detector at 0V (leads shorted together) |
| 2021 | pre-bias detector to 65V apparent |
| 2025 | settling to 8.5mV leakage, for 61.6V true bias, bump to 67V apparent. –> settle on 70V apparent; 7.12mV leakage; 67V true |
| 2037 | done pre-biasing, turn down to 52.4V apparent, to try to get close to 50V true, waiting to settle |
| 2053 | went a little crazy tuning: 51.4 apparent; 3.44mV leak; 50.02V true |
| 2056 | Start 12 1-hour data series of 1-sided 50V HV coincidence data with Frontend Gain = (15/15/5)/(3/4/4), OG = 4/2, QET biases = table from Apr 28, with 1000 beginning randoms, no flashing, and a 500ADC bin threshold trigger on DCRC4 pA (external trigger). Running OR trigger of NaI detectors with PuBe source on west side of shield. NaI detector C has 311 mV threshold and detector B has 288 mV threshold |