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2011/08/28

0130 Piping cleaned and reassembled.
Recommence evacuating main bath. Pressure in P2 decreases below 1 mbar, indicating that there is no remaining liquid nitrogen.
0150 Fill IVC with 1.4 mbar He-4 exchange gas.
Conduct electrical check at 77 K - no problems.
0205 Start first LHe transfer.
0215 Fill N2 cold trap full.
0325 Pump out He-4 exchange gas at mixing chamber temperature of 20 K.
1650 Fill N2 cold trap full.
Close gate valve and condenser line speedivalve. Close all valves on IGH. Start cryocleaning mixture through cold trap 2; open valve 6 to 13.2%.
1710 Mixture has stagnated. Open valve 6 to 14.0%.
1735 Conduct electrical check at 5.5 K.
Detector: G102 DIB1 BH: Stripline: 19
SC: ZB1-4-6 300 K 80K LHe
Face: 2 Date 2011-08-26 Date 2011-08-28 Date 2011-08-28
SQUET: ZC23 Who HC&JZ Who HC&JZ Who HC&JZ
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 1.7 OK 80 - 140 93 OK
SQUID bias B/Ret 19 34 5 OK 2 OK 80 - 140 94 OK
SQUID bias C/Ret 8 24 4.6 OK 1.8 OK 80 - 140 101 OK
SQUID bias D/Ret 23 39 4.3 OK 1.7 OK 80 - 140 92 OK
Feedback A/Ret 37 21 15 - 25 k 18 OK 9 - 13 k 7.6 OK 1.0 - 1.3 k 1.28 OK
Feedback B/Ret 2 18 20 OK 8.6 OK 1.0 - 1.3 k 1.28 OK
Feedback C/Ret 41 25 19 OK 8 OK 1.0 - 1.3 k 1.27 OK
Feedback D/Ret 22 6 18 OK 7.4 OK 1.0 - 1.3 k 1.27 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 85,106,85,86,86 OK 30 - 40 50,70,48,49,49 OK 20 - 30 32,56,31,32,32 OK
QET B/Ret 35 29, 33, 47, 48 86,85,87,86 OK 49,48,50,49 OK 20 - 30 31,30,32,31 OK
QET C/Ret 7 5, 9, 10, 28 88,85,74,84 OK 52,49,37,47 OK 20 - 30 34,32,20,30 OK
QET D/Ret 38 36, 40, 43, 44 84,84,84,84 OK 49,48,48,48 OK 20 - 30 32,31,31,31 OK
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.068 OK 1.0 - 1.1 k 1.043 OK 1.0 - 1.1 k 1.27 OK
Qi bias/QET Ret 15 24 - 26 nS 38 MOhm OK < 1 nS OK OK <1 nS OK OK
Qo bias/QET Ret 11 38 MOhm OK OK OK <1 nS OK OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS OL OK 6 - 8 nS OL OK <1 nS OK OK
Qo feedback/Drain/Source 30 12, 27 OL OK OL OK <1 nS OK 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 0.87 OK 0.9 - 1.0 V 1.141 OK — OK
LED 1 42 chassis 1.0 - 1.1 V 1.259 – 1.2 - 1.5 V 1.483 – — –
LED 2 26 chassis 1.239 – 1.466 – — –
Detector: G102 DIB2 BH: Stripline: 20
SC: ZB1-4-8 300 K LN LHe
Face: 5 Date 2011-08-26 Date 2011-08-28 Date 2011-08-28
SQUET: ZC70 Who HC&JZ Who HC&JZ Who HC&JZ
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 4.8 OK 1 - 2 k 2 OK 80 - 140 96 OK
SQUID bias B/Ret 19 34 4.4 OK 1.8 OK 80 - 140 102 OK
SQUID bias C/Ret 8 24 4.6 OK 1.9 OK 80 - 140 93 OK
SQUID bias D/Ret 23 39 5.2 OK 2.2 OK 80 - 140 92 OK
Feedback A/Ret 37 21 15 - 25 k 29 OK 9 - 13 k 15 OK 1.0 - 1.3 k 1.26 OK
Feedback B/Ret 2 18 26 OK 10 OK 1.0 - 1.3 k 1.26 OK
Feedback C/Ret 41 25 28 OK 15 OK 1.0 - 1.3 k 1.27 OK
Feedback D/Ret 22 6 35 OK 18 OK 1.0 - 1.3 k 1.25 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 80,100,79,80,79 OK 30 - 40 48,68,45,46,46 OK 20 - 30 25,45,22,23,23 OK
QET B/Ret 35 29, 33, 47, 48 76,76,77,76 OK 40,40,41,40 OK 20 - 30 24,23,25,24 OK
QET C/Ret 7 5, 9, 10, 28 80,77,69,76 OK 47,44,36,43 OK 20 - 30 26,23,15,22 OK
QET D/Ret 38 36, 40, 43, 44 80,80,80,80 OK 47,47,46,46 OK 20 - 30 25,24,24,24 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 1.26 OK
Qi bias/QET Ret 15 24 - 26 nS 38 MOhm OK < 1 nS OK OK <1 nS OK OK
Qo bias/QET Ret 11 39 MOhm OK OK OK <1 nS OK OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS OL OK 6 - 8 nS OL OK <1 nS OK OK
Qo feedback/Drain/Source 30 12, 27 OL OK OL OK <1 nS OK 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 open OK 0.9 - 1.0 V open OK — OK
LED 1 42 chassis 1.0 - 1.1 V 1.235 – 1.2 - 1.5 V 1.466 – — –
LED 2 26 chassis 1.218 – 1.455 – — –
1740 Stop cryocleaning mixture, and pump it into dump.
Start 1 K pot.
1800 Start condensing mixture through cold trap 1.
1945 Mixture condensed. Start circulation.
IVC pressure 8.6E-7 mbar. Isolate IVC.
2010 Valve 6 fully open, mixture out of dump and circulating.
2015 Close needle valve a little to maintain 1 K pot temperature between 1.5 and 1.6 K.
2035 Flash and bake detector overnight.