2022/09/24 (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 source in storage in PAN443. |
| NaI trigger window: 7.6-11.2 MeV | |
| Cooled to base yesterday after ninth 5K pumpout. Temperature spikes began at 5:45 am. | |
| Taking 0V NaI-triggered data overnight. | |
| 1221 | Dial HV up to -7.36V nominal, -4.92V actual, for 20% prebias (using RootSequencer) |
| 1226 | Dial HV down to -6.4V nominal, -4.18V actual |
| 1230 | HV = -4.2 V, Vtest = -0.2 mV, Ileak = -0.2 uA, Vdet = -4.1 V (98%). |
| Noticed that phonon baselines are significantly lower now than the -0.80 V I set them to yesterday (around -0.83 or -0.84) | |
| 1233 | Start -4.1 V bg data series 57 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1331 | Start -4.1 V bg 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 |
| 1535 | MC/Coldplate = 29.5/150 mK, Still = 1.13 K / 0.110 mbar / 0 mW, G1/G2 = 121/126 mbar, 1K Pot = 60° / 1.59 K / 12±1 mbar, MB = 33.6% |
| 1543 | Begin LHe transfer @ MB = 33.6% |
| 1545 | Fill LN2 cold trap bath |
| 1623 | End LHe transfer @ MB = 93.5% |
| 1635 | Stop data series and dial HV down to 0V actually no, I forgot to enable DCRC2 |