2018/08/12 (Sunday)
| 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) → DCRCX(4) DCRC33(2) → kepco 1kV power supply → HV input |
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| status: Took SiHV+NaI PuBe data overnight. Vbias very close to 40 V, Vtest varied between 4-5 mV, so Vdetector = 38.0-38.4 V | |
| 0850 | Tower/MC/Coldplate = 32.7/29.4/183 mK, Still = 1.4±0.1 K / 0.085 mbar, G1/G2 = 115/107 mbar, 1K Pot = 1.64 K / 30 mbar, Turbo on IVC = 1.0 nbar, MB = 30.0% |
| 0900 | Fill LN2 cold trap bath. |
| 0915 | Begin LHe transfer @ 29.2% |
| 1017 | Start 5 x 2hr 40 V PuBe datasets each split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-40×6-15_5PreBias-30Flash 30wait-2hrData-10minSubRun.msl CDMS detector: Driver Gains = 2x, QET biases = (280/260/305)/(140/280/295) uA, Front-End Gains = 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) → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |