2018/09/17 (Monday)
| 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 22Na data overnight at -80V. |
| 0925 | Tower = 30.9 mK (cooling after flash), Still = 0.080 mbar, G1/G2 = 134/130 mbar, 1K Pot = 1.59 K / 17 mbar, Turbo on IVC = 1.0 nbar, MB = 71.2% |
| 0930 | Fill LN2 cold trap bath. |
| 0950 | Tower/MC/Coldplate = 29.6/28.9/183 mK, Still = 1.4 mW / 1.5±0.1 K / 0.080 mbar, G1/G2 = 134/128 mbar, 1K Pot = 1.59 K / 17 mbar |
| 1438 | Stop sequence after flash. |
| 1441 | Return 22Na to safe. |
| 1450 | Place PuBe source on the ground south of cryostat, pushed up against south lab wall. This gives a reasonably high rate in the NaI with some pileup, but will hopefully let us see the direct gammas. |
| 1457 | Start 1hr NaI calibration dataset split into 10min 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 DCRC4pA/B threshold = 100/100 |
| 1615 | Remove PuBe source from lab and return to lead castle in PAN 434. |
| 1630 | Fill LN2 cold trap full. |
| 1635 | Set HV = -50V using change_HV_0_to_50_preBias_15_5_DCRC2.msl |
| 1644 | 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 |