2022/06/01 (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) |
| NaI trigger configuration: detectors 10,11,12, threshold range 1300-2100 | |
| 1245 | Experiment with Na-22 source near NaI detectors. With source on top of stack, NaI rate = 44±14 Hz. Taped to Det3: 90±26 Hz. Near bottom of vertical stack: 160±27 Hz. Hanging near Det 11 (not sure how far down exactly): 1930±310 Hz. So it certainly seems like we have the correct NaI detectors triggering. |
| 1300 | Place Na-22 source on the North side of the fridge, level with the detector in a lead castle, 40cm from mu-metal shield (closer than yesterday) |
| 1305 | Check phonon channels, many are off their baselines. Relock those channels: now their baselines are in the expected ~ -0.8 V |
| 1310 | Start 0 V Na-22 data series 76 min long, source 40cm from mu-metal shield, with 1000 initial randoms, 5 Hz in-run randoms, trigger on DCRC3pD threshold 10. Start series with the Start Button. |
| 1320 | MC/Coldplate = 28.5/146 mK, Still = 1.09 K / 0.100 mbar / 0 mW, G1/G2 = 168/156 mbar, 1K Pot = 45° / 1.56 K / 9.0±0.5 mbar, MB = 37.6% |
| 1320 | Fill LN2 cold trap bath |
| 1606 | Begin LHe transfer @ MB = 34.1% |
| 1654 | End LHe transfer @ MB = 95.7% |