2018/09/18 (Tuesday)
| 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 → DCRC55(1)/DCRC50(3) 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V) / Ortec 575A(gain=10, shaping = 3us) → x10/x10 attenuator → DCRCX(4) DCRC33(2) → kepco 1kV power supply → HV input |
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| status: | Took bg data overnight at -50V. Long dataset without flashing. |
| 0830 | Tower/MC/Coldplate = 29.6/28.9/181 mK, Still = 1.0 mW / 1.4±0.1 K / 0.080 mbar, G1/G2 = 128/124 mbar, 1K Pot = 1.59 K / 17 mbar, Turbo on IVC = 0.86 nbar, MB = 37.5% |
| 0835 | Fill LN2 cold trap bath. |
| 0835 | Dial HV down to 0V using change_HV_50_to_0_DCRC2.msl |
| 1110 | Flash DCRCs 1,3 for 30 seconds |
| 1505 | Start LHe transfer (MB = 28.0%) |
| 1607 | End LHe transfer (MB = 90.6%) |
| 1714 | Fill LN2 cold trap full. |
| 1733 | Set HV = 50V using change_HV_0_to_50_preBias_15_5_DCRC2.msl |
| 1741 | Start 14 hr, 50 V, hold time dataset split into 10 min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence timed_subrun.msl CDMS detector: Driver Gains = 2x, QET biases = (280/260/305)/(140/280/295) uA, Front-End Gains = (10/10/10)/(10/15/10) NaI detector: 1.1kV → NaI B/C → Ortec 452(gain=5, shaping = 6 us, output=10V, Pos) / Ortec 575A(gain=10, shaping = 3us, Pos) → x10/x10 attenuator → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/C/D threshold = 7/10/9 |