2022/09/28 (Wednesday)
- 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 tenth 5K pumpout. Temperature spikes began at 7:45 am. | |
| 1425 | MC base 28.3 mK with most spikes peaking below 29.0 mK, some above 29.4 mK |
| 1425 | MC/Coldplate = 28.3/149 mK, Still = 1.12 K / 0.110 mbar / 0 mW, G1/G2 = 118/98 mbar, 1K Pot = 45° / 1.59 K / 13±1 mbar, MB = 38.4% |
| 1430 | Fill LN2 cold trap bath |
| 1545 | Check phonon channels. They look OK. After relocking all baselines are near -0.8 V except DCRC3pA which will need offset adjustment. |
| 1549 | Begin LHe transfer @ MB = 37.4% |
| 1600 | Fine-adjust phonon offsets to get channels close to -0.80 V |
| 1634 | End LHe transfer @ MB = 92.1% |