2022/04/12 (Tuesday)
- Lab in-personnel: Matt, Nikki
| Status | Run 76 in progress |
|---|---|
| Setup | Cable 2/1/3 → diverter/nothing/nothing → HV CONN1/2/3 → HV 1/2 → DCRC50(3)/DCRC55(1), NaI trigger signal → DCRC52(6) actually discovered later that Cables 1&3 were swapped. |
| 1000 | Do mini-IbIs on DCRC3pB. dP/dI = 0.7/1.0 uV → QET bias = 229.0/245.5 uA. |
| 1030 | Do mini-IbIs on DCRC3pC. dP/dI = 1.0/1.1/1.2 uV → QET bias = 264.1/270.4/275.4 uA. |
| 1240 | MC/Coldplate = 27.8/140 mK, Still = 1.06 K / 0.110 mbar / 0 mW, G1/G2= 144/145 mbar, 1K Pot = 18° / 1.60 K / 16±2 mbar, MB = 24.0% |
| 1240 | Goldman = 68.5 mK @ 632 uV excitation |
| 1245 | Fill LN2 cold trap bath |
| 1410 | Do mini-IbIs on DCRC1pB. Difficult because it was doing that flatline thing at high QET bias, had to kind of guess the offset. dP/dI = 1.0/0.7 uV → QET bias = 246.5/232.8 uA. |
| 1420 | Do mini-IbIs on DCRC1pC. dP/dI = 0.7/1.0 uV → QET bias = 219.2/230.8 uA. |
| 1430 | Do mini-IbIs on DCRC1pD. dP/dI = 0.7/1.0 uV → QET bias = 196.6/209.5 uA. |
| 1450 | Set QET biases on all channels to target dP/dI = 1.0 uV except DCRC3pA and DCRC3pC, target dP/dI = 1.2 uV instead, to reduce oscillations. |
| 1505 | Begin LHe transfer @ MB = 20.0% |
| At MB~75% I turned off the heater on the 250L Dewar. About 2 minutes after the level hit max (100.5%) I pulled up both sides of the transfer line to stop flow of liquid. Then waited 15 minutes for pressure to die down somewhat. | |
| 1610 | End LHe transfer @ MB = 90.4% |
