2022/08/23 (Tuesday)
- Lab in-personnel: Giulia, 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 West side of lead/poly shield. |
| Restarted circulation recently after warming to 5K and pumping out IVC. | |
| 0930 | MC/Coldplate = 31.1/150 mK, Still = 1.13K / 0.080 mbar / 0 mW, G1/G2 = 228/210 mbar, 1K Pot = 45° / 1.60 K / 18±1 mbar, MB = 34.0 % |
| 0942 | Begin LN2 transfer |
| 1320 | Currently the MC minimum is 31.5 mK with frequent spikes at a wide variety of heights, peaking between 32 and 40 mK |
| 1350 | Try mini-IbIs on both DCRC1pA and DCRC1pD. Both seem to be in the normal state all the way down to QET bias 0 |
| 1355 | Try mini-IbIs on DCRC3pD too, also seems stuck in normal |
| 1355 | Stop DAQ programs and turn off DCRCs 1&3 for a bit. |
| 1410 | MC cools a little with DCRCs off, from 31.5 mK base to about 30.3 mK base. |
| 1410 | Repower DCRCs, restart DAQ programs, zap SQUIDs on DCRCs 1&3 |
| 1606 | Begin LHe transfer @ MB = 26.0 % |