2022/10/02 (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 behind lead wall on West side of lead/poly shield. |
| NaI trigger window: 7.6-11.2 MeV | |
| Cooled to base yesterday after eleventh 5K pumpout. Taking -83V low-threshold SiHV-triggered PuBe data overnight. | |
| 0905 | Temperature spikes start. |
| 1700 | MC base has been rising since spikes started, from 29.1 to 29.4 mK. Spikes peaking mostly below 30.0 mK, some above 31.0 mK. |
| 1705 | Begin LHe transfer @ MB = 34.7% |
| 1715 | HV = -91.9 V, Vtest = -21.1 mV, Ileak = -23.2 uA, Vdet = -82.6 V (90%). |
| 1750 | End LHe transfer @ MB = 92.5% |