2020/10/25 (Sunday)

Setup	Run 73. DIB 1/3/4 → Stripline 43/48/41 → pi-filters 1/2/3 → Cable 3/1/2 → nothing/nothing/accessory_interposer → HV_Conn 1/3/2 → HV 1/2 → DCRCX(4)/DCRC55(1)-master; DCRC33(2) → HV control. DCRCs on. Lead/poly shield erected (4 lead walls, 2 poly walls).
0850	Tower thermometer wandering between 92.8 and 93.5 mK. IbIs on DCRC1pD implies detector temperature around 60.2 mK. Pattern consistent with last night.

0856	Start a 60 min series at HV = +10V, drifting 0.0225 V/s, no prebias, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = set automatically to track temperature, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pB/D threshold = 8/8 Use RootSequencer.c, function drift_sequence(10,0.0225,3600,0,0) Use QETbias_update.c, function sequence_update_QETbiases(62,30,0,0.0885,52.04)
0856	Vtest = 0.2 mV shortly after drift begins. Drift starts at 10.2 V. 0.78% HV loss.
	Tower thermometer wandered between 92.7 and 93.4 mK during series.
0957	Vtest = 0.48 V at end of drift. Final HV = +91.5 V. 0.21% HV loss.

1055	Double-click Arduino_Create_Bridge on desktop, then go to Arduino Web Editor and select Monitor. This causes the Tower temperature to spike to 1.4 K, then fall.
1255	Matt Fritts body temperature = 96.4 F
1340	Matt enters lab
1345	Tower/MC/Coldplate = 93.3/31.8/199 mK, Still = 1.55 K / 0.130 mbar / 0 mW, G1/G2= 250/220 mbar, 1K Pot = 1.62 K / 21±2 mbar.
1413	Begin LHe transfer @ MB = 18.2%
1420	Swap HV leads to negative polarity
1425	Fill LN2 cold trap bath
1447	Finish LHe transfer @ MB = 93.7%
1515	MB = 93.3%
1530	Measure resistance to Backward Endstop on source mover. This reads O/L, since the source carriage is still 0.5 mm from the stop. Tried to set up the Keithley to measure this (instead of measuring V across the HV test resistor) but can't figure out how to make it stay in resistance measurement mode, keeps switching back to voltage.
1700	Matt leaves lab

1955	Do more IbIs to get detector temperature versus Tower thermometer relationship. Detector around 59.4 mK, Tower thermometer around 88 mK.
2006	Start a 60 min series at HV = -100V, drifting 0.0290 V/s, prebias 15% for 2min, CDMS detector: Driver Gains = 1x, DCRC4/1 QET biases = set automatically to track temperature, Front-End Gains = (3/3/3)/(5/5/5) 1000 BOR & 5 Hz in-run randoms, trigger on DCRC1pB/D threshold = 8/8 Use RootSequencer.c, function drift_sequence(100,0.0290) Use QETbias_update.c, function sequence_update_QETbiases(63,30,0,0.0337,56.41)
2006	Vtest = -0.55 mV shortly after drift begins. Drift starts at -107.6 V. 0.20% HV loss.
	Tower thermometer wandered between 86.6 and 88.3 mK during series
2107	Vtest = -0.86 V at end of drift. HV = -211.4 V. 0.16% HV loss.