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2011/04/26

1330 Fill N2 cold trap full.
Pump mixture into dump in preparation for cleaning cold trap 2.
1440 Pressure in P1 0.026 mbar. Close all valves on IGH. Open valves 2a, 5a, 7 & 11b to connect cold trap 2 to He-4 pump. Remove cold trap 2 from LN2 bath.
1535 Pressure in P2 reaches 340 mbar as cold trap warms to room temperature.
Turn on He-4 pump and start cleaning cold trap with heat gun.
1745 Place cold trap 2 back in main bath. Wait for it to cool.
1805 Stop pumping on cold trap 2 and close all valves on IGH.
Start cryocleaning mixture through cold trap 2.
Fill N2 cold trap full.
1830 Start 1 K pot.
1905 Pump mixture into dump.
1940 Pressure in G2 622 mbar. Start to condense mixture.
1950 LabView program doesn't react when pressure in G1 rises to 360 mbar, putting strain on the 1 K pot. Stop running program and resume manual operation. Close valves 12a & 13a, and wait for pressure in G1 to drop.
Stop pumping out He-4 exchange gas at pressure 4.6E-7 mbar.

Electrical Check at 4.2 K

Detector: G42 DIB1 BH: Stripline: 20
SC: ZB1-1-9 300 K LN LHe
Face: 5 Date 2011-04-23 Date 2011-04-25 Date 2011-04-26
SQUET: ZC70 Who HC & JZ Who HC & JZ Who HC
Signal Pos. lead Gnd lead Nominal Actual Chassis Nominal Actual Chassis Nominal Actual Chassis
(Gnd lead) (Gnd lead) (Gnd lead)
Nominal: Nominal: Nominal:
< 0.1 nS < 0.1 nS < 0.1 nS
Phonon
SQUID bias A/Ret 4 20 3 - 5 k 4.9 OK 1 - 2 k 1.96 OK 80 - 140 97 OK
SQUID bias B/Ret 19 34 4.4 OK 1.7 OK 80 - 140 104 OK
SQUID bias C/Ret 8 24 4.7 OK 1.82 OK 80 - 140 92 OK
SQUID bias D/Ret 23 39 5.3 OK 2.09 OK 80 - 140 93 OK
Feedback A/Ret 37 21 15 - 25 k 29.4 OK 9 - 13 k 15 OK 1.0 - 1.3 k 1.26 OK
Feedback B/Ret 2 18 25.6 OK 9.2 OK 1.0 - 1.3 k 1.27 OK
Feedback C/Ret 41 25 28.6 OK 4.2 OK 1.0 - 1.3 k 1.25 OK
Feedback D/Ret 22 6 34.8 OK 17.4 OK 1.0 - 1.3 k 1.25 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 79.5,81.2,79.2,80.1,80.1 OK 30 - 40 43,44,42,43,43 OK 20 - 30 22,21,23,22,22 OK
QET B/Ret 35 29, 33, 47, 48 76,76,79,76 OK 37,37,40,37 OK 20 - 30 23,22,26,23 OK
QET C/Ret 7 5, 9, 10, 28 78, 77, 69, 77 OK 41,41,33,40 OK 20 - 30 23,22,14,21 OK
QET D/Ret 38 36, 40, 43, 44 81, 80, 80, 80 OK 44,43,43,43 OK 20 - 30 24,23,23,23 OK
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.06 OK 1.0 - 1.1 k 1.04 OK 1.0 - 1.1 k 1.2 OK
Qi bias/QET Ret 15 24 - 26 nS 39MΩ OK < 1 nS OK OK <1 nS OK OK
Qo bias/QET Ret 11 39MΩ OK OK OK <1 nS OK OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 43.5MΩ, 43.5MΩ OK 6 - 8 nS 50MΩ, 50MΩ OK <1 nS >54MΩ,>54MΩ OK
Qo feedback/Drain/Source 30 12, 27 43.6MΩ, 43.6MΩ OK 50MΩ, 50MΩ OK <1 nS 53MΩ,53MΩ OK
Qi drain 16 chassis < 0.1 nS – OK < 0.1 nS – OK <0.1 nS – OK
Qo drain 12 chassis – OK – OK <0.1 nS – OK
Qi source 31 chassis – OK – OK <0.1 nS – OK
Qo source 27 chassis – OK – OK <0.1 nS – OK
FET Tsense +/FET heater- 49 46 0.6 - 0.7 V 0.7 OK 0.9 - 1.0 V 1.084 OK — OK
LED 1 42 chassis 1.0 - 1.1 V 1.13 – 1.2 - 1.5 V 1.411 – — 6.2MΩ –
LED 2 26 chassis 1.12 – 1.403 – — 6.2MΩ –
Detector: G42 DIB2 BH: Stripline: 19
SC: ZB1-1-6 300 K LN LHe
Face: 2 Date 2011-04-23 Date 2011-04-25 Date 2011-04-26
SQUET: ZC23 Who HC & JZ Who HC & JZ Who HC
Signal Pos. lead Gnd lead Nominal Actual Chassis Nominal Actual Chassis Nominal Actual Chassis
(Gnd lead) (Gnd lead) (Gnd lead)
Nominal: Nominal: Nominal:
< 0.1 nS < 0.1 nS < 0.1 nS
Phonon
SQUID bias A/Ret 4 20 3 - 5 k 4.4 OK 1 - 2 k 1.63 OK 80 - 140 104 OK
SQUID bias B/Ret 19 34 5 OK 1.99 OK 80 - 140 92 OK
SQUID bias C/Ret 8 24 4.6 OK 1.73 OK 80 - 140 102 OK
SQUID bias D/Ret 23 39 4.3 OK 1.58 OK 80 - 140 92 OK
Feedback A/Ret 37 21 15 - 25 k 19 OK 9 - 13 k 7.3 OK 1.0 - 1.3 k 1.28 OK
Feedback B/Ret 2 18 21 OK 8.2 OK 1.0 - 1.3 k 1.28 OK
Feedback C/Ret 41 25 19 OK 7.6 OK 1.0 - 1.3 k 1.27 OK
Feedback D/Ret 22 6 18 OK 8.1 OK 1.0 - 1.3 k 1.27 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 85, 87, 85, 86, 86 OK 30 - 40 44,46,44,45,46 OK 20 - 30 29,31,29,30,31 OK
QET B/Ret 35 29, 33, 47, 48 86, 86, 89, 86 OK 45,44,47,44 OK 20 - 30 30,29,32,29 OK
QET C/Ret 7 5, 9, 10, 28 86, 85, 75, 85 OK 45,45,34,44 OK 20 - 30 31,30,20,29 OK
QET D/Ret 38 36, 40, 43, 44 85, 84, 84, 84 OK 45,44,44,44 OK 20 - 30 31,30,29,30 OK
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.069 OK 1.0 - 1.1 k 1.044 OK 1.0 - 1.1 k 1.2 OK
Qi bias/QET Ret 15 24 - 26 nS 38MΩ OK < 1 nS OK OK <1 nS OK OK
Qo bias/QET Ret 11 38MΩ OK OK OK <1 nS OK OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 43MΩ, 43MΩ OK 6 - 8 nS 49MΩ, 49MΩ OK <1 nS 54MΩ,54MΩ OK
Qo feedback/Drain/Source 30 12, 27 43MΩ, 43MΩ OK 49MΩ, 49MΩ OK <1 nS 52MΩ,52MΩ OK
Qi drain 16 chassis < 0.1 nS – OK < 0.1 nS – OK <0.1 nS – OK
Qo drain 12 chassis – OK – OK <0.1 nS – OK
Qi source 31 chassis – OK – OK <0.1 nS – OK
Qo source 27 chassis – OK – OK <0.1 nS – OK
FET Tsense +/FET heater- 49 46 0.6 - 0.7 V 0.721 OK 0.9 - 1.0 V 1.091 OK — OK
LED 1 42 chassis 1.0 - 1.1 V 1.138 – 1.2 - 1.5 V 1.417 – — 6.2MΩ –
LED 2 26 chassis 1.128 – 1.407 – — 6.2MΩ –
2310 Fill N2 cold trap full.