2018/09/08 (Saturday)
| 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 background data overnight at -80V. |
| 1205 | Fill LN2 cold trap bath. |
| 1211 | Stop sequence, it's waiting after a flash. |
| 1219 | Start LHe transfer (MB = 35.7%) |
| 1225 | Tower/MC/Coldplate = 31.1/30.3/185 mK, Still = 1.5±0.1 K / 0.055 mbar, G1/G2 = 119/103 mbar, 1K Pot = 1.58 K / 19 mbar, Turbo on IVC = 0.86 nbar. |
| 1308 | End LHe transfer (MB = 92.9%) |
| 1317 | Start 10 x 2hr background datasets at -80V split into 10min subruns, with CDMS and NaI detectors running and DCRC2 as HV controller. Using sequence HVscan-80×10-15_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) → x10/x10 attenuator → DCRC4PB/PA, Driver Gains = 1/1, PhononWaveFormLength = 1024 (512 samples), PhononPrepulseSamples = 64 (64 samples) 1000 BOR randoms, trigger on DCRC3pB/D threshold = 7/9 |
| 2100 | DCRC3pC baseline is too high. Adjust offset -1.5 → -1.1 |
| 2152 | Now DCRC3pC is railed low. Adjust offset -1.1 → -1.3 |