2022/01/26 (Wednesday)
- Lab in-personnel: Matt
| Status | Run 75 in progress |
|---|---|
| Setup | Tower Faces 5/3/2 → Cables 2/1/3 → nothing/diverter_board/nothing → DCRC55(1)/DCRC50(3)/DCRCx(4) Lead shield in place. Am Source y = 0.03 mm |
| 0930 | Some channels look a little screwy, so zap SQUIDs. This causes temperature to drop from 42.4 to 40.8 mK. |
| 1110 | Goldman = 40.8 mK. Set QET biases to target dP/dI=1.0 uV and adjust driver offsets so baselines ~ -0.9 V |
| 1121 | Start 0V data series, 40 min long, with 1000 initial randoms, no in-run randoms, trigger on DCRC3pB threshold 10. Start series with the Start Button. |
| 1125 | Goldman/Tower/MC(H35)/Coldplate = 40.8/72.0/33.4/182 mK, Still = 1.47 K / 0.110 mbar / 0 mW, G1/G2= 265/240 mbar, 1K Pot = 1.60 K / 13±1 mbar, MB = 37.7%. |
| 1132 | Goldman = 41.0. Readjust QET biases accordingly. (Note - I did this by copy-pasting odbedit commands from my Excel spreadsheet to a terminal.) |
| 1320 | Begin LHe transfer @ MB = 34.7% |
| 1354 | End LHe transfer @ MB = 93.6% |
| 1405 | Fill LN2 cold trap bath. |
| 1620 | Do some electrical checks on the Side1-HV/Side2-readout HV board. Checked all the lines that should be biased according to spreadsheet. On CONN1 the charge-related lines are not biased - that's probably good (no charge channels). On CONN3 it looks like there are two that should be connected to HV that aren't, and to that shouldn't be that are… |