2019/06/13 (Thursday)

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.
0715	Start a 74 min series at HV = 220→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_220V_cal0612_2p418VPM_prebias_10_2_dur_74min_flashDCRC_1_4.msl

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.

0715

Start a 74 min series at HV = 220→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_220V_cal0612_2p418VPM_prebias_10_2_dur_74min_flashDCRC_1_4.msl

Noise widths based on PTOF (unbalanced) for +180V, +200V, +220V → 400V data in the last couple days:
- 180V: 20.6 eVee
- 200V: 24.2 eVee
- 220V: 26.6 eVee

0905	Fill LN2 Cold trap bath
0915	Tower/MC/Coldplate = 42.1/32.8/201 mK, Still = 1.29 K / 0.090 mbar, G1/G2 = 148/136 mbar, 1K Pot = 1.64 K / 24 mbar. MB = 67.7% italicized values were taken while the tower was still cooling after a flash.
1054	Start a 99 min series at HV = 160→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_160V_cal0612_2p418VPM_prebias_10_2_dur_99min_flashDCRC_1_4.msl
1402	Start a 100 min series at HV = 140→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_140V_cal0612_2p418VPM_prebias_10_2_dur_100min_flashDCRC_1_4.msl

Noise width based on PTOF (unbalanced):
- 160V: 22.9 eVee
- 140V: 25.1 eVee

1645	Fill LN2 Cold trap bath
1650	HV is meant to be set at 0, but is reading 2.2 V. Why is that calibration drifting now? Adjust the low end of the calibration file HV_calibrations/HV_DCRC2_control_cals_440V_190612.txt
1711	Start a 30 min series at 0V 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.

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