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2019/06/14 (Friday)

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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 → DCRCX(4)/DCRC55(1)
DCRC33(2) → 1kV power supply → HV input
Three walls of the lead/poly shield are up.
0905 Tower/MC/Coldplate = 41.7/30.8/198 mK, Still = 1.26 K / 0.090 mbar, G1/G2 = 149/149 mbar, 1K Pot = 1.63 K / 24 mbar. MB = 32.6%
Coldplate and Still are reading in their “high” modes
0910 Fill LN2 Cold trap bath
0947 Start an 80 min series at HV = 100→290V, rate 2.418V/min with 10% prebias for 2 minutes, flash at end with 30 min wait.
CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/490)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5)
1000 BOR and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6.
Use sequence HVdrift_100V_cal0612_2p418VPM_prebias_10_2_dur_80min_flashDCRC_1_4.msl
  • Noise width based on PTOF (unbalanced):
    • 100V: 29.2 eVee
1300 Commence LHe transfer. MB=26.8%
1350 Cease LHe transfer. MB=90.9%
Had a little trouble with putting the stoppers in the main bath. Recovery meter ran backwards briefly during this time period.
1430 Start a 42 min series at HV = 300→400V, rate 2.418V/min with 10% prebias for 2 minutes, flash at end with 30 min wait.
CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/490)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5)
1000 BOR and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6.
Use sequence HVdrift_300V_cal0612_2p418VPM_prebias_10_2_dur_42min_flashDCRC_1_4.msl
1540 Fill LN2 Cold trap bath
1730 Start a 90 min series at HV = 180→400V, rate 2.418V/min with 10% prebias for 2 minutes, flash at end with 30 min wait.
CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/490)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5)
1000 BOR, 5Hz InRun, and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6.
Use sequence HVdrift_180V_cal0612_2p418VPM_prebias_10_2_dur_90min_flashDCRC_1_4.msl
2019 Start a 90 min series at HV = 180→400V, rate 2.418V/min with 10% prebias for 2 minutes, flash at end with 30 min wait.
CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = (490/400/490)/(420/480/450) uA, Front-End Gains = (2/2/3)/(5/5/5)
1000 BOR, 5Hz InRun, and 1000 EOR randoms, trigger on DCRC1pB/C/D threshold = 6/6/6.
Use sequence HVdrift_180V_cal0612_2p418VPM_prebias_10_2_dur_90min_flashDCRC_1_4.msl

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