2018/08/21 (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) → DCRCX(4) DCRC33(2) → kepco 1kV power supply → HV input |
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| status: Took SiHV+NaI PuBe data overnight. | |
| 0932 | Tower/MC/Coldplate = 30.7/29.4/185 mK, Still = 1.4±0.1 K / 0.075 mbar, G1/G2 = 113/105 mbar, 1K Pot = 1.62 K / 22 mbar, Turbo on IVC = 1.0 nbar, MB = 30.2% |
| 0937 | Fill LN2 cold trap bath, LN2 dewar runs dry. |
| 1003 | Start 1 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-40×1-15_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 |
| 1025 | Leakage is a bit higher than normal (7.6 mV vs. 3.6 mV) because we aren't purging with LN2 gas right now. |
| 1125 | Reconnect ebox purge line to LN2 dewar. Top off LN2 cold trap. |
| 1358 | Begin LHe transfer @ MB = 22.6% |
| 1454 | End LHe transfer @ MB = 93.2% |
| monitoring MB level meter and recovery meter. For MB level meter: ls /data/chocula/mast/cdms/webcam/images | |
| 1537 | Start 6 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) → 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 |
| 1650 | Fill LN2 cold trap full. |