2010/10/17 · UMN CDMS Wiki archive

1200	SQUET card ZC-23 connected to DIB1
	Electrical check conducted - all looks good

Cooldown checkout sheet (rev C SQUET)
Detector:	G41		BH:
SC:	ZB1-1-9		RT
Face:	8		Date	2010-10-17
SQUET:	ZC23		Who	HC
Signal	Pos. lead	Gnd lead	Nominal	Actual	Chassis
					(Gnd lead)
					Nominal:
					< 0.1 nS
Phonon
SQUID bias A/Ret	4	20	3 - 5 k	4.4	OK
SQUID bias B/Ret	19	34		5	OK
SQUID bias C/Ret	8	24		4.6	OK
SQUID bias D/Ret	23	39		4.3	OK

Feedback A/Ret	37	21	15 - 25 k	18	OK
Feedback B/Ret	2	18		20	OK
Feedback C/Ret	41	25		19	OK
Feedback D/Ret	22	6		18	OK

QET A/Ret	3	1, 13, 14, 17, 32	60 - 80	89,91,85,85,85	OK
QET B/Ret	35	29, 33, 47, 48		87,86,95,87	OK
QET C/Ret	7	5, 9, 10, 28		86,85,74,84	OK
QET D/Ret	38	36, 40, 43, 44		84,84,83,84	OK

Charge
FET heater +/-	45	46	1.0 - 1.1 k	1.068	OK

Qi bias/QET Ret	15		24 - 26 nS	26	OK
Qo bias/QET Ret	11			26	OK

Qi feedback/Drain/Source	50	16, 31	15 - 17 nS	23,23	OK
Qo feedback/Drain/Source	30	12, 27		23,23	OK

Qi drain	16	chassis	< 0.1 nS	–	OK
Qo drain	12	chassis		–	OK
Qi source	31	chassis		–	OK
Qo source	27	chassis		–	OK

FET Tsense +/FET heater-	49	46	0.6 - 0.7 V	0.723	OK
LED 1	42	chassis	1.0 - 1.1 V	1.137	–
LED 2	26	chassis		1.127	–

1400	IVC sealed
	Note: Remember to use vacuum grease! It took far too long to clean the flanges!
	IVC evacuated
1549	Start He-3 and He-4 pump. Pump fridge from both ends. Open V9, V6, V5, and V1. Power glitch always turns off the pump. We may need something to prevent this. G2=652mbar.
1945	Background He leak rate 1E-9 mbar l/s
	He leak check reveals leak rate of 1E-9 mbar l/s