2019/06/28 (Friday)
| Setup | DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer ?/3/2 → HVConn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC55(1) DCRC33(2) → 1kV power supply → HV input Three walls of the lead/poly shield are up. |
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| 0550 | Start a sequence of 3 @ 87 min series at HV = 180→400V, rate 2.49V/min, with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/495)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR, 5Hz InRun randoms, trigger on DCRC1pD threshold = 6. Use sequence HVdrift_3X180V_2p49VPM_loopversion_prebias_10_2_dur_87min_flashDCRC_1_4.msl |
- The first series produced 93 dumps. So there seems to be no lag between the single-series sequence with loops and this three-series sequence
- It seems as though having a sequence with many lines causes the MIDAS sequencer to run slowly. Maybe it has to re-read the entire sequence after every command. Doesn't seem to matter whether the sequencer tab is open on a browser.
| 0901 | Tower/MC/Coldplate = 38.9/29.4/199 mK, Still = 1.39 K / 0.18 mbar / 6mW, G1/G2 = 219.1/205.1 mbar, 1K Pot = 1.62 K / 19.0 mbar. MB = 33.6% |
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| 0912 | Fill LN2 cold trap bath from transfer dewar. |
| 1422 | Begin LHe transfer MB = 25.5% |
| 1520 | End LHe transfer MB = 89.7% |
| 1540 | Fill LN2 cold trap bath from transfer dewar. |
| 1711 | Start a sequence of 6 @ 87 min series at HV = 180→400V, rate 2.49V/min, with 10% prebias for 2 minutes, flash at end with 30 min wait. CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/495)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5) 1000 BOR, 5Hz InRun randoms, trigger on DCRC1pD threshold = 6. Use sequence HVdrift_6X180V_2p49VPM_loopversion_prebias_10_2_dur_87min_flashDCRC_1_4.msl |