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2010/11/14

1100 No gross leak found at BG 1.4E-9 cc/s
Raise Dewar
Cryoclean mixture

Electrical checks at 300 K

SQUET card ZC-23

Detector: G41 BH:
SC: ZB1-1-9 RT
Face: 8 Date 2010-11-14
SQUET: ZC23 Who HC & JZ
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
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 90,100,85,86,86 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
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 0.726 OK
LED 1 42 chassis 1.0 - 1.1 V 1.136 –
LED 2 26 chassis 1.126 –

SQUET card ZC-70

Detector: G41 BH:
SC: ZB1-1-6 RT
Face: 5 Date 2010-11-14
SQUET: ZC70 Who HC & JZ
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
SQUID bias A/Ret 4 20 3 - 5 k 4.9 OK
SQUID bias B/Ret 19 34 4.4 OK
SQUID bias C/Ret 8 24 4.6 OK
SQUID bias D/Ret 23 39 5.2 OK
Feedback A/Ret 37 21 15 - 25 k 29 OK
Feedback B/Ret 2 18 25 OK
Feedback C/Ret 41 25 28 OK
Feedback D/Ret 22 6 35 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 85,98,75,80,80 OK
QET B/Ret 35 29, 33, 47, 48 77,77,86,77 OK
QET C/Ret 7 5, 9, 10, 28 78,76,69,76 OK
QET D/Ret 38 36, 40, 43, 44 80,80,80,80 OK
FET heater +/- 45 46 1.0 - 1.1 k 1.06 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 open OK
LED 1 42 chassis 1.0 - 1.1 V 1.133 –
LED 2 26 chassis 1.124 –
1621 Pump main bath.
He signal jumps to 1E-7 cc/s range and drops slowly to 7E-9cc/s
1645 Pump the He gas out again He signal jumps to 1.4E-8 cc/s and then drops.
1649 He signal rises to 2E-8 cc/s when filling He gas and drops slowly
1704 Put in IVC 1.2 mbar N2 exchange gas (8.6 mbar in the exchange gas manifold)
1713 Start transferring N2
2040 Finished transferring at resistance 1322 Ohm.
2106 Fill N2 cold trap full