2017/03/24 (Friday) · UMN CDMS Wiki archive

	Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33
	Took data at 20 V overnight
0930	Tower = 33.0 mK, Main bath = 65.4%. Boil off rate: faster than slow mode (predicted level: 68.2%).
0935	Fill LN2 cold trap bath.
0935	HV = 20.0 V, Vtest = 0.7 mV, Vdetector = 19.7 V
0935	Dial HV down to 0V, ground detector, flash for 30 seconds
1015	Set HV=90 V.
1020	Adjust trace lengths in ODB for DCRC1, DCRC2 to 26.2144ms (ChargeWaveFormLength = 131072, PhononWaveFormLength = 65536)
1021	Set QET biases to values used for earlier noise data: here

1023	Start 30 min 90V HV transition long trace random data set with 26.2144ms trace length, Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2, QET biases=table here, 5Hz in-run randoms with no starting/ending randoms.
1027	HV = 90V, V_leak = 6.2 mV, V_crystal = 87.3 V
1114	Ground and flash detector
1200	Set HV=90 V.
	Set QET biases to 300uA

1208	Start 30 min 90V HV normal long trace random data set with 26.2144ms trace length, Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2, QET biases=(300/300/300)/(-/-300/-300), 20Hz in-run randoms with no starting/ending randoms.
1210	HV = 90V, V_leak = 6.6 mV, V_crystal = 87.1 V
1400	HV = 90V, V_leak = 6.2 mV, V_crystal = 87.3 V
1400	Dial HV down to zero and ground detector.
1415	Flash detector for 30 seconds
1540	Set HV to 20.00 V
1545	HV = 20.0 V, Vtest = 0.3 mV → Vdetector = 19.9 V
1548	Start sequence of 16, 1-hour data series of 1-sided 20V HV data with Frontend Gain = (20/20/20)/(-/4/5), OG = 4/2, QET biases = table from Mar 15, with 1000 beginning randoms, no flashing, and a 15ADC bin threshold trigger on DCRC1 pA
1550	Tower/MC/Coldplate = 33.1/31.5/189 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 260/240 mbar, 1K Pot = 1.695 K / 30 mbar, Main bath = 56.1%.