2014/04/11

0025	Cease helium transfer. Helium liquid level 92.4%.
0035	Fill N2 cold trap full.
1125	Fill LN2 cold trap full.
1350	Perform IbIs measurements with DCRC33 plugged into DIB1 and DIB2 grounded using the shorting board. The newly calculated QET biases are listed below:

1440	Start flashing detector for 1 minute followed by 20 minute cooldown and data acquisition. DIB1 (DCRC33) set at 0V bias with DIB2 grounded with shorting board for 5-minute data series. 3.2768 ms trace length; 400 us delay; 200 uS coincidence time; 2K events per file. Phonon OR trigger thresholds set at 30 ADC for phonon channels A&D and 35 ADC for phonon channels B&C.
1700	Performed a rough charge breakdown measurement by biasing the crystal from +/- 12V to -/+ 12V in increments of 1V. With DIB1 set at positive bias voltage and DIB2 set at negative bias, charge breakdown was seen at approximately 9V.
	When the crystal was biased with the opposite polarity (i.e. DIB1 and DIB2 at negative and positive biases, respectively) charge breakdown was seen at roughly 8V.