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2013/08/19

1130 Filled LN2 cold trap.
1440 Pump mixture into dump in preparation for condensation.
1600 Mixing chamber temperature 8.1K. IVC pressure 4.0e-6 mbar.
Isolate IVC and start 1K pot.
1630 1K pot temperature 1.8K. Open condenser speedivalve and gate valve. Pressure in dump 690 mbar.
Commence manual condensation procedure through nitrogen cold trap 1.
1700 339 mbar of mixture left in dump.
1735 Cease manual condensation procedure: valve V12A on IGH fully open. Wait for mixing chamber temperature to decrease further.
1920 Mixing temperature temperature between 4.2K and 3.1K during electrical check.
QET and QET Return lines seem to have a slight short to ground. Found conductances that decrease to 1.0nS-2.5nS on various QET lines. However, we've decided to assess this problem again at base temperature.
Detector: G106a DIB1 BH: Stripline: 27
SC: ZB1-4-4 300 K 80K LHe
Face: 2 Date 2013-08-14 Date 2013-08-17 Date 2013-08-17
SQUET: ZC-70 Who CP Who CP Who CP
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 4.8k OK 1 - 2 k 1.9k OK 80 - 140 100 OK
SQUID bias B/Ret 19 34 4.4k OK 1.7k OK 80 - 140 105 OK
SQUID bias C/Ret 8 24 4.6k OK 1.8k OK 80 - 140 97 OK
SQUID bias D/Ret 23 39 5.2k OK 2.1k OK 80 - 140 96 OK
Feedback A/Ret 37 21 15 - 25 k 29k OK 9 - 13 k 15k OK 1.0 - 1.3 k 1.2k OK
Feedback B/Ret 2 18 25k OK 9.2k OK 1.0 - 1.3 k 1.2k OK
Feedback C/Ret 41 25 28k OK 14k OK 1.0 - 1.3 k 1.3k OK
Feedback D/Ret 22 6 34k OK 17k OK 1.0 - 1.3 k 1.2k OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 112, 111, 91, 93, open 1.3nS 30 - 40 74, 64, 53, 56, open OK 20 - 30 55, 46, 32, 35, open 1.6nS
QET B/Ret 35 29, 33, 47, 48 80, 79, 114, 79 1.3nS 41, 40, 80, 40 OK 20 - 30 26, 25, 46, 25 1.7nS
QET C/Ret 7 5, 9, 10, 28 open, 81, 72, 80 1.3nS open, 45, 36, 44 OK 20 - 30 open, 26, 17, 25 1.3nS
QET D/Ret 38 36, 40, 43, 44 85, open, 83, 83 1.3nS 48, open, 45, 45 OK 20 - 30 27, open, 25, 25 1.4nS
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.06k OK 1.0 - 1.1 k 1.04k OK 1.0 - 1.1 k 1.2k OK
Qi bias/QET Ret 15 24 - 26 nS 26 1.1nS < 1 nS <0.1ns OK <1 nS <0.3nS OK
Qo bias/QET Ret 11 26 1.1nS <0.1ns OK <1 nS <0.3nS OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 24, 24 OK 6 - 8 nS 21, 21 OK <1 nS 19, 19 OK
Qo feedback/Drain/Source 30 12, 27 24, 24 OK 21, 21 OK <1 nS 20, 20 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 1.08 OK — – OK
LED 1 chassis 42 1.0 - 1.1 V 1.12 – 1.2 - 1.5 V 1.4 – — – –
LED 2 chassis 26 1.12 – 1.4 – — – –
Detector: G106a DIB2 BH: Stripline: 19
SC: ZB1-4-6 300 K LN LHe
Face: 5 Date 2013-08-14 Date 2013-08-17 Date 2013-08-19
SQUET: ZC-13 Who CP Who CP Who CP
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 4.6k OK 1 - 2 k 1.7k OK 80 - 140 109 OK
SQUID bias B/Ret 19 34 4.8k OK 1.8k OK 80 - 140 104 OK
SQUID bias C/Ret 8 24 5.3k OK 2.1k OK 80 - 140 123 OK
SQUID bias D/Ret 23 39 4.9k OK 1.9k OK 80 - 140 103 OK
Feedback A/Ret 37 21 15 - 25 k 18k OK 9 - 13 k 7.5k OK 1.0 - 1.3 k 1.3k OK
Feedback B/Ret 2 18 20k OK 8.1k OK 1.0 - 1.3 k 1.3k OK
Feedback C/Ret 41 25 29k OK 11.6k OK 1.0 - 1.3 k 1.3k OK
Feedback D/Ret 22 6 21k OK 8.5k OK 1.0 - 1.3 k 1.2k OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 124, 108, 92, 94, 93 1.2 30 - 40 77, 70, 55, 57, 56 OK 20 - 30 62, 52, 40, 43, 41 2.5nS
QET B/Ret 35 29, 33, 47, 48 87, 86, 110, 86 1.2 48, 47, 77, 47 OK 20 - 30 32, 31, 60, 31 1.9nS
QET C/Ret 7 5, 9, 10, 28 102, 90, 79, 89 1.2 60, 48, 37, 47 OK 20 - 30 46, 33, 22, 31 0.8nS
QET D/Ret 38 36, 40, 43, 44 90, 87, 87, 87 1.3 50, 47, 47, 47 OK 20 - 30 33, 31, 30, 31 1.6nS
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.08k OK 1.0 - 1.1 k 1.01k OK 1.0 - 1.1 k 1.23k OK
Qi bias/QET Ret 15 24 - 26 nS 25 OK < 1 nS <0.2nS OK <1 nS <0.5ns OK
Qo bias/QET Ret 11 26 OK <0.1nS OK <1 nS <0.4ns OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 23, 23 OK 6 - 8 nS 20, 20 OK <1 nS 19, 19 OK
Qo feedback/Drain/Source 30 12, 27 23, 23 OK 20, 20 OK <1 nS 19, 19 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 1.09 OK — – OK
LED 1 chassis 42 1.0 - 1.1 V 1.12 – 1.2 - 1.5 V 1.41 – — – –
LED 2 chassis 26 1.12 – 1.39 – — – –
Detector: G106a DIB3 BH: Stripline: 20
SC: ZB1-4-8 300 K LN LHe
Face: 6 Date 2013-08-14 Date 2013-08-17 Date 2013-08-19
SQUET: ZC-23 Who CP Who CP Who CP
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 4.4k OK 1 - 2 k 1.6k OK 80 - 140 98 OK
SQUID bias B/Ret 19 34 5.0k OK 2.0k OK 80 - 140 96 OK
SQUID bias C/Ret 8 24 4.6k OK 1.7k OK 80 - 140 96 OK
SQUID bias D/Ret 23 39 4.3k OK 1.6k OK 80 - 140 90 OK
Feedback A/Ret 37 21 15 - 25 k 18k OK 9 - 13 k 7.3k OK 1.0 - 1.3 k 1.3k OK
Feedback B/Ret 2 18 20k OK 8.2k OK 1.0 - 1.3 k 1.3k OK
Feedback C/Ret 41 25 19k OK 7.6k OK 1.0 - 1.3 k 1.2k OK
Feedback D/Ret 22 6 18k OK 7.0k OK 1.0 - 1.3 k 1.2k OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 107, 93, 77, 79, 78 1.3nS 30 - 40 70, 62, 46, 48, 46 OK 20 - 30 54, 47, 31, 33, 31 1.9nS
QET B/Ret 35 29, 33, 47, 48 72, 72, 91, 72 1.3nS 39, 38, 69, 38 OK 20 - 30 25, 24, 56, 24 2.0nS
QET C/Ret 7 5, 9, 10, 28 81, 71, 63, 70 1.3nS 53, 37, 29, 36 OK 20 - 30 34, 24, 16, 23 1.8nS
QET D/Ret 38 36, 40, 43, 44 73, 71, 70, 71 1.3nS 39, 37, 37, 37 OK 20 - 30 26, 24, 24, 24 2.1nS
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.06k OK 1.0 - 1.1 k 1.04k OK 1.0 - 1.1 k 1.2k OK
Qi bias/QET Ret 15 24 - 26 nS 0.1nS OK < 1 nS <0.1nS OK <1 nS <0.4nS OK
Qo bias/QET Ret 11 0.1nS OK <0.1nS OK <1 nS <0.3nS OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 23, 23 OK 6 - 8 nS 20, 20 OK <1 nS 18, 18 OK
Qo feedback/Drain/Source 30 12, 27 23, 23 OK 20, 20 OK <1 nS 19, 19 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 0.72 OK 0.9 - 1.0 V 1.09 OK — – OK
LED 1 chassis 42 1.0 - 1.1 V 1.1 10 nS 1.2 - 1.5 V 1.4 OK — – –
LED 2 chassis 26 1.1 open 1.39 23 nS — – 13 nS
2205 Switch thermometer. Mixing chamber temperature 2.2 K and pressures in G1 & G2 are less than 70 mbar. Close valve V3 on IGH and commence manual circulation procedure.
2215 Fill N2 cold trap full.
2230 Valve V6 fully open on IGH; cease manual circulation procedure. Await mixing chamber to reach base temperature.