2022/09/25 (Sunday)
- 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 two days ago after ninth 5K pumpout. | |
| 0950 | Dial HV up to -27.6V nominal, -25.3V actual, for 20% prebias (using RootSequencer) |
| 0955 | Dial HV down to -24.0V nominal, -21.6V actual |
| 1000 | Phonon baselines are around -0.83 V. Readjust offsets to get them all near -0.80 V |
| 1005 | HV = -21.6 V, Vtest = -1.3 mV, Ileak = -1.4 uA, Vdet = -21.1 V (97%). |
| 1006 | Start -21.1 V bg data series 49 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1056 | Start -21.2 V bg data series 54 good min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| 1100 | HV = -21.6 V, Vtest = -1.1 mV, Ileak = -1.2 uA, Vdet = -21.2 V (98%). |
| 1315 | HV = -21.7 V, Vtest = -0.9 mV, Ileak = -1 uA, Vdet = -21.3 V (98%). |
| 1315 | Some kind of DAQ crash, dumps after #53 are empty. |
| 1320 | Start -21.3 V bg data series 113 good min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| 1630 | Fill LN2 cold trap bath |
| 1635 | Another DAQ crash |
| 1637 | Dial HV up to -109.25V nominal, -107.2V actual, for 15% prebias (using RootSequencer) |
| 1640 | MC/Coldplate = 29.4/150 mK, Still = 1.12 K / 0.110 mbar / 0 mW, G1/G2 = 115/116 mbar, 1K Pot = 60° / 1.59 K / 12±1 mbar, MB = 64.5% |
| 1642 | Dial HV down to -95V nominal, -92.9V actual |
| Vtest is a little higher than usual, Vdet = 89%. Let's step the HV down a little. | |
| 1647 | Dial HV down to -93V nominal, -90.8V actual |
| 1648 | HV = -90.8 V, Vtest = -19.3 mV, Ileak = -21.2 uA, Vdet = -82.3 V (91%). |
| 1649 | Start -82.3 V bg data series 48 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1735 | HV = -90.8 V, Vtest = -18.9 mV, Ileak = -20.7 uA, Vdet = -82.5 V (91%). |
| 1737 | Start -82.5 V bg data series 906 good min long, NaI-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC4pA threshold 20. Start series with the Start Button |
| DAQ crash around 8:30am, dumps after 906 are empty |