2022/11/30 (Wednesday)
- Lab in-personnel: Giulia
| 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 - 5.13 MeV |
| Cooled to base yesterday after twenty-eighth 5K pumpout. Temperature spikes began around 2:15 am | |
| 1320 | Fill LN2 cold trap dewar |
| 1330 | MC/Coldplate = 30.9/149 mK, Still = 1.12 K / 0.110 mbar / 0 mW, G1/G2 = 146/136 mbar, 1K Pot = 60° / 1.58 K / 10.0±1.0 mbar, MB = 64.1% |
| 0115 | DCRC1pA baseline = -0.800 V |
| start a data series to monitor when the phonons go bad. I'll set a high threshold. | |
| 0118 | Start 0 V PuBe data series ## min long, SiHV-triggered with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC1pA threshold 200. Start series with the Start Button |