UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20120127

2012/01/27

0110 Pump out He-4 exchange gas at 4.5 K. A little late… temperature dropped very rapidly after 8 K, and was caught sleeping. Hopefully it'll be alright. Leave IVC to pump out overnight.
1115 Filled LN2 cold trap.
Temp: 5.3 K ; IVC pressure: 4E-7 mbar
1820 Begun LHe transfer (21.4%)
1851 Tower: 5.8 K, Still: 2700 Ω, Cold plate: 2741 Ω, MC: 2685 Ω
1930 End LHe transfer (~92%)
Pump mixture into dump
2210 Conduct electrical check at 4.2 K: no problems found.
Detector: G102 DIB1 BH: Stripline: 19
SC: ZB1-4-8 300 K LN LHe
Face: 2 Date 2012-01-24 Date 2012-01-26 Date 2012-01-27
SQUET: ZC23 Who HC Who RR & SM 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 1.62 OK 80 - 140 104 OK
SQUID bias B/Ret 19 34 5 OK 2 OK 80 - 140 91 OK
SQUID bias C/Ret 8 24 4.6 OK 1.7 OK 80 - 140 101 OK
SQUID bias D/Ret 23 39 4.3 OK 1.6 OK 80 - 140 91 OK
Feedback A/Ret 37 21 15 - 25 k 18 OK 9 - 13 k 7.3 OK 1.0 - 1.3 k 1.28 OK
Feedback B/Ret 2 18 20 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 7.1 OK 1.0 - 1.3 k 1.26 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 107,93,87,90,88 OK 30 - 40 60.1, 52, 47, 50, 48 OK 20 - 30 47,38,32,35,33 OK
QET B/Ret 35 29, 33, 47, 48 87,87,91,87 OK 47, 46, 51, 47 OK 20 - 30 32,31,36,31 OK
QET C/Ret 7 5, 9, 10, 28 84,85,74,84 OK 44, 44, 34, 44 OK 20 - 30 30,30,19,29 OK
QET D/Ret 38 36, 40, 43, 44 87,84,84,84 OK 47, 44, 44, 44 OK 20 - 30 33,30,30,30 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 open, 39 MOhm (B) OK < 1 nS open OK <1 nS >55 MOhm OK
Qo bias/QET Ret 11 open, 39 MOhm (B) OK open OK <1 nS >55 MOhm OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 44 MOhm OK 6 - 8 nS 50 Mohm OK <1 nS >55 MOhm OK
Qo feedback/Drain/Source 30 12, 27 44 MOhm OK 50 Mohm OK <1 nS 54 MOhm 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 0.726 OK 0.9 - 1.0 V 1.09 OK — OK
LED 1 42 chassis 1.0 - 1.1 V 1.139 – 1.2 - 1.5 V 1.42 – — –
LED 2 26 chassis 1.128 – 1.41 – — –
Detector: G102 DIB2 BH: Stripline: 20
SC: ZB1-4-6 300 K LN LHe
Face: 5 Date 2012-01-24 Date 2012-01-26 Date 2012-01-27
SQUET: ZC70 Who HC Who RR & SM 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 4.8 OK 1 - 2 k 1.9 OK 80 - 140 96 OK
SQUID bias B/Ret 19 34 4.4 OK 1.7 OK 80 - 140 103 OK
SQUID bias C/Ret 8 24 4.6 OK 1.8 OK 80 - 140 94 OK
SQUID bias D/Ret 23 39 5.2 OK 2.08 OK 80 - 140 93 OK
Feedback A/Ret 37 21 15 - 25 k 29 OK 9 - 13 k 14.96 OK 1.0 - 1.3 k 1.26 OK
Feedback B/Ret 2 18 25 OK 9.18 OK 1.0 - 1.3 k 1.26 OK
Feedback C/Ret 41 25 28 OK 14.18 OK 1.0 - 1.3 k 1.26 OK
Feedback D/Ret 22 6 35 OK 17.38 OK 1.0 - 1.3 k 1.25 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 96,88,82,85,82 OK 30 - 40 59, 52, 46, 48, 46 OK 20 - 30 41,30,25,27,25 OK
QET B/Ret 35 29, 33, 47, 48 78,78,82,78 OK 39, 39, 43, 39 OK 20 - 30 25,24,29,25 OK
QET C/Ret 7 5, 9, 10, 28 76,76,69,76 OK 40.5, 40, 33, 40 OK 20 - 30 22,22,14,21 OK
QET D/Ret 38 36, 40, 43, 44 83,80,80,80 OK 46, 44, 43, 43 OK 20 - 30 26,23,23,23 OK
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.061 OK 1.0 - 1.1 k 1.04 OK 1.0 - 1.1 k 1.25 OK
Qi bias/QET Ret 15 24 - 26 nS open, 40 MOhm (C&D) OK < 1 nS >55 MOhm OK <1 nS >55 MOhm OK
Qo bias/QET Ret 11 open, 39 MOhm (C&D) OK >55 MOhm OK <1 nS >55 MOhm OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 43 MOhm OK 6 - 8 nS 50 MOhm OK <1 nS 53 MOhm OK
Qo feedback/Drain/Source 30 12, 27 43 MOhm OK 49 MOhm OK <1 nS 55 MOhm 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 0.71 OK 0.9 - 1.0 V 1.08 OK — OK
LED 1 42 chassis 1.0 - 1.1 V 1.137 – 1.2 - 1.5 V 1.4 – — –
LED 2 26 chassis 1.127 – 1.4 – — –
2230 Fill N2 cold trap full.
Open gate valve and condenser line speedivalve. Start condensing mixture through nitrogen cold trap 1.