2010/03/03

Run Diary

Reset DCRC

Time
10:40	Save the following settings as Preset 2

SQUID settings
Channel	Frontend Gain	Output Gain	Feedback Null	Driver Offset	SQUID Bias (uA)	Lockpoint (mV)	QET Bias(uA)
A	7	1	0	0	95	3.6	-136.9
B	7	1	0	0	100	3.4	-120.1
C	7	1	0	0	92	3.2	-120.1
D	7	1	0	0	95	3.5	-120.1

Q Inner (V)	3
Q Outer (V)	3

Time
10:45	Soft reset DCRC and then load Preset 2
	Open I:\Labview\DCRC\20100303\DCRC.llb\SCDMS_DetectorReadout.vi and checked that the above operation worked.
	Lookback time spikes still show up once in a while when triggering on phonon channels.

Pulses after loading Preset 2

Spikes show up once in a while when triggering on phonon channels

Test LED Flashing

Time
11:21	Tower T = 24.8mK (224.1kOhm). Try LED 1 only. I = 400 uA (164/4095); ON = 100 us; OFF = 800 us.
	LED DC offset found not fixed
14:09	LED DC offset fixed in version 20100303
14:23	DAQ stopped for an error when need to flash

Error

Time
14:50	The same error occurred even only the readout vi was running