2015/09/04 (Friday)

	Current setup: DIB1/2/3 → cables → 3.2 MHz filters → HV1/2 → DCRC50/55. Unused LED is grounded.
	Overnight, Cf source in shield activating detector, detector baking (2 LEDs), Tower = 284 mK, Still = 0.10 mbar
0930	Remove Cf-252 source from fridge.
0930	Fill LN2 cold trap full.
0930	Stop baking detector. Tower cools to 32 mK after 20 minutes
1132	Commence LHe transfer (17.9%).
1210	End LHe transfer (78.9%).
1315	Tower/MC(H35)/MC sensor/Cold Plate = 30.8/24.3/39.7/150 mK, Still = 1.30 K / 0.080 mbar, G1/G2 = 155 mbar, 1K Pot = 1.72 K / 24 mbar, Main bath = 78.5%.
1400	Charge channels have the regular spike pattern seen before so we will need to power cycle the DCRCs. Also some sort of triangle waveform in HV1pB.
1445	DCRCs repowered and SQUIDs zapped, but now a 250 Hz sine wave dominating the phonons. Power cycle again.
1540	Channels look good now except HV1pB, which has some very regular pattern at 80 Hz, not the same pattern as before but probably the same frequency. Looks for all the world like response to some sort of test signal, no idea.
1600	Preparing to take data with MultiDAQ at a few HV settings. The purpose is to look for “effective Luke voltage” in phonon spectra and see how noise changes with HV, inspired by UCB studies.
1620	After some struggle with MultiDAQ choose the following settings:

Output gain setting=3, Frontend gain setting=1
	Driver Offset (V)	Threshold		Driver Offset (V)	Threshold
HV1pA	-0.026	45	HV2pB	0.028	inf
HV1pB	0.032	30	HV2pC	0.000	45
HV1pC	~~0.034~~ 0.196	75	HV2pD	0.030	20

1626	Take data: - bad data. Some railing, some settings seem to have change, must have done something wrong.
1639	Take data: - bad data. Had set the trigger to only read out the live channels, but only one channel was showing in HV2.
1646	Take data: - bad data. This time include Qi and Qo to read out on HV2. Five traces seen on HV2 but clearly not the right ones.
1650	Set trigger to read out all 12 channels (including unconnected ones). This works.
	For all data sets below: Side 1 bias = 0, Output gain settings = 3. 1000 randoms, 2000 events/file. Data rate about 10 Hz for randoms, 30 Hz for triggered.
1653	Take data: HV = 0 V. 10 minutes.
1708	Take data: HV = 7.00 V / 11.5 nA. The thresholds seem OK still. 11 minutes.
1724	Take data: HV = 15.00 V / 24.8 nA. Phonon baselines significantly elevated but pulses still look good. 21 minutes.
1727	Fill LN2 cold trap full.
1750	Put Cf source in shield near detector for weekend activation