2022/02/03 (Thursday)
- Lab in-personnel: Matt, Nikki, Giovanna, Giulia
| Status | Run 75 in progress |
|---|---|
| Setup | Tower Faces 5/3/2 → Cables 2/1/3 → nothing/diverter_board+extra_board/nothing → HVboard CONN1/2/3 → HV1/2 → DCRC55(1)/50(3) Lead shield in place. Am Source y = 0.03 mm |
| 1345 | Goldman/Tower/MC(H35)/Coldplate = 41.1/71.6/34.0/182 mK, Still = 1.39 K / 0.110 mbar / 0 mW, G1/G2= 267/227 mbar, 1K Pot = 1.59 K / 11±1 mbar, MB = 33.4% |
| 1408 | Fill LN2 cold trap bath. |
| 1525 | Watching pulses, change HV on detector to 149.1 V. Definitely more jagged noise in the detector. |
| 1525 | Goldman = 41.1 mK. Set QET biases to target dP/dI=1.0 uV and adjust driver offsets so baselines ~ -0.9 V |
| 1525 | Use RootSequencer to step bias up to 150V over 30 seconds. |
| 1529 | Start +149.1 V data series, 32 min long, with 1000 initial randoms, no in-run randoms, trigger on DCRC3pC threshold 30. Start series with the Start Button. |
| Note: Goldman fell to 40.9 during series and I didn't adjust the QET biases. | |
| Note: the last couple of HV sequences were done without prebiasing. Should try the same thing with prebiasing, see if noise improves. | |
| 1605 | After end of data sequence, use Root Sequencer to step HV down to 0V over 30 seconds. |
| 1618 | Begin LHe transfer @ MB = 30.0% |
| 1654 | End LHe transfer @ MB = 92.3% |