2022/09/10 (Saturday)
- Lab in-personnel: Matt
| Status | Run 76 in progress |
|---|---|
| Setup | Cables 2/3/1 → diverter/nothing/nothing → Side2-readout HV CONN 1/3/2 → HV 1(L)/2(R) → DCRC50(3)/DCRC55(1), DCRC33(2)→HV control, NaI trigger signal → DCRCX(4) Lead/poly shield fully assembled. Boron-filled socks covering NaI detectors. PuBe behind lead wall on West side of lead/poly shield. |
| NaI trigger window: 7.6-11.2 MeV | |
| Second day at base after fifth 5K pumpout. Taking -21V NaI-triggered data overnight | |
| 1200 | MC base around 29.0 mK, most spikes peak below 34 mK |
| 1210 | Start -20.7 V PuBe data series 38 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1215 | HV = -21.7 V, Vtest = -1.4 mV, Ileak = -1.6 uA, Vdet = -21.1 V (97%). |
| 1220 | Check pulses, look good, baselines look good, all near -0.8 V |
| 1250 | Dial HV down to 0V using RootSequencer |
| 1430 | MC/Coldplate = 29.0/150 mK, Still = 1.13 K / 0.080 mbar / 0 mW, G1/G2 = 144/133 mbar, 1K Pot = 60° / 1.60 K / 14±1 mbar, MB = 35.8% |
| 1430 | Fill LN2 cold trap dewar |
| 1505 | Dial HV up to -7.36V nominal, -4.94V actual, for 20% prebias (using RootSequencer) |
| 1510 | Dial HV down to -6.4V nominal, -4.20V actual |
| 1517 | Start -4.1 V PuBe data series ## min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1520 | Pulses and baselines look good |
| 1520 | HV = -4.2 V, Vtest = -0.1 mV, Ileak = -0.2 uA, Vdet = -4.1 V (99%). |
| 1608 | Start -4.1 V PuBe data series ## min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| 1610 | HV = -4.2 V, Vtest = -0.1 mV, Ileak = -0.1 uA, Vdet = -4.1 V (99%). |
| 1850 | Check phonon traces - still look OK |
| 1855 | HV = -4.1 V, Vtest = -0.1 mV, Ileak = -0.1 uA, Vdet = -4.1 V (99%). |
| 2210 | Check phonon traces, still look OK |