2022/11/12 (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 W side of fridge. NaI array trigger window = 4.73 - 5.93 MeV |
| Cooled to base yesterday after twenty-second 5K pumpout. Temperature spikes began at 2:40 am. | |
| Taking -82V data overnight. Trying lower NaI trigger window, targeting a different strong line in the Si (n,gamma) spectrum. | |
| 0940 | MC base = 30.1 mK, spikes peaking below 31.2 mK |
| 0940 | DCRC1pA baseline = -0.787 V |
| 0943 | Start -82.2 V PuBe data series 101 min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pB threshold 10. Start series with the Start Button |
| 1127 | Start -82.1 V PuBe data series ## 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 |
| 1215 | HV = -91.8 V, Vtest = -22.2 mV, Ileak = -24.4 uA, Vdet = -82.1 V (89%). |
| 1325 | MC/Coldplate = 30.0/150 mK, Still = 1.11 K / 0.065 mbar / 0 mW, G1/G2 = 132/119 mbar, 1K Pot = 60° / 1.59 K / 11.5±1.0 mbar, MB = 64.7% |
| 1330 | Fill LN2 cold trap bath |
| 2055 | MC base = 29.9 mK. Most spikes peak below 33 mK, some above 35 mK |
| 2055 | DCRC1pA baseline = -0.788 V |
| 2250 | HV = -91.8 V, Vtest = -22.2 mV, Ileak = -24.4 uA, Vdet = -82.1 V (89%). |
| 2249 | Start -82.1 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 |
| 2355 | DCRC1pA baseline = -0.785 V |
| 0000 | Start -82.1 V PuBe data series ## 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 |