2022/02/05 (Saturday)
- Lab in-personnel: Matt
| 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 = 30.03 mm |
| 1010 | Some channels look ugly after the source move yesterday. Zap SQUIDs. |
| 1115 | Goldman = 41.1 mK. Set QET biases to target dP/dI=1.0 uV. Adjust driver offsets so baselines ~ -0.9 V |
| 1120 | Ramp HV up to 112.6V using RootSequencer. This is prebias |
| 1125 | After 5 minutes ramp HV down to 98.11 V |
| 1128 | Start 98.11 V data series after 5 min 15% prebias, 33 min long, with 1000 initial randoms, no in-run randoms, trigger on DCRC3pC threshold 20. Start series with the Start Button. |
| 1139 | Goldman = 41.0 mK. Readjust QET biases to target dP/dI=1.0 uV. |
| 1200 | After stopping series dial HV down to 0.0 V using RootSequencer |
| 1420 | Goldman/Tower/MC(H35)/Coldplate = 41.0/68.9/33.9/179 mK, Still = 1.36 K / 0.110 mbar / 0 mW, G1/G2= 267/249 mbar, 1K Pot = 1.59 K / 11±1 mbar, MB = 31.3% |
| 1425 | Fill LN2 cold trap bath. |
| 1428 | Begin LHe transfer @ MB = 31.3% |
| 1506 | End LHe transfer @ MB = 91.2% |
| 1515 | Swap HV leads on Kepco 1kV power supply to reverse bias. (Now we will be applying -bias to Side2.) |
| 1640 | Goldman = 41.0 mK. Set QET biases to target dP/dI=1.0 uV. Adjust driver offsets so baselines ~ -0.9 V |
| 1644 | Ramp HV up to -112.7V using RootSequencer. This is prebias |
| 1649 | After 5 minutes ramp HV down to -98.10 V |
| 1651 | Start -98.10 V data series after 5 min 15% prebias, 64 min long, with 1000 initial randoms, no in-run randoms, trigger on DCRC3pC threshold 15. Start series with the Start Button. |
| 1755 | After stopping series dial HV down to 0.0 V using RootSequencer |
Some analysis notes:
- 20V data: noise width 22 eV with unmodified OF, 18.7 eV with OF linearized wrt INT
- 100V data: noise width 19.2 eV with unmodified OF, 11.8 eV with OF linearized wrt INT
- 150V data: noise width 61 eV with unmodified OF, 16.9 eV with OF linearized wrt INT
- 100V data with prebias: noise width 8.1 eV with OF linearized wrt INT
- New: 100V data with prebias and source at y=30mm: noise width 6.5 eV with OF linearized wrt INT
- New: -100V data with prebias and source at y=30mm: noise width 7.3 eV with OF linearized wrt INT