UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20121202

2012/12/02

1215 Filled LN2 cold trap.
Fed Cricket 4 pellets.
1220 Mixture cleaning stalled again overnight. Increased V6 by 0.2% to get flow going again. Will wait for an hour of cleaning before proceeding with cool down to base temperature.
1237 Mixing chamber temp: 7.5 K
1317 Electrical check done. There were a couple of surprising thing (though nothing to stop us from moving forward)
Dib 1: SQUID bias B to return, like G103a, increases dramatically (it initially jumped to 290 ohms when entering the probes). SQUID bias C to return also increased up to 204 Ohms and then leveled off.
Dib 2: SQUID bias C to return increased up to 222 Ohms and then leveled off.
Detector: G106a DIB1 BH: Stripline: 19
SC: ZB1-4-6 300 K 80K LHe
Face: 2 Date 2012-11-28 Date 2012-11-30 Date 2012-12-02
SQUET: ZC23 Who RR, AK Who RR Who RR
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 1.6 OK 80 - 140 108 OK
SQUID bias B/Ret 19 34 5 OK 2 OK 80 - 140 >150 (charges like a capacitor) OK
SQUID bias C/Ret 8 24 4.6 OK 1.7 OK 80 - 140 204 OK
SQUID bias D/Ret 23 39 4.3 OK 1.6 OK 80 - 140 128 OK
Feedback A/Ret 37 21 15 - 25 k 18 OK 9 - 13 k 7.3 OK 1.0 - 1.3 k 1.21 OK
Feedback B/Ret 2 18 20 OK 8.2 OK 1.0 - 1.3 k 1.23 OK
Feedback C/Ret 41 25 19 OK 7.6 OK 1.0 - 1.3 k 1.2 OK
Feedback D/Ret 22 6 18 OK 7.1 OK 1.0 - 1.3 k 1.2 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 137, 115, 93, 97, 95 OK 30 - 40 71, 65, 46, 49, 47 OK 20 - 30 46, 47, 34, 38, 35 OK
QET B/Ret 35 29, 33, 47, 48 90, 89, 107,90 OK 49, 48, 60, 48 OK 20 - 30 36,35,47,36 OK
QET C/Ret 7 5, 9, 10, 28 90, 86, 75, 85 OK 50, 45, 34, 44 OK 20 - 30 38,33,22,32 OK
QET D/Ret 38 36, 40, 43, 44 114, 86, 86, 86 OK 57, 46, 45, 46 OK 20 - 30 44, 34, 34 ,34 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 1.21 OK
Qi bias/QET Ret 15 24 - 26 nS 25 OK < 1 nS <1 nS OK <1 nS < 1 OK
Qo bias/QET Ret 11 26 OK <1 nS OK <1 nS < 1 OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 23 OK 6 - 8 nS 20 OK <1 nS 19,19 OK
Qo feedback/Drain/Source 30 12, 27 23 OK 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 0.726 OK 0.9 - 1.0 V 1.09 OK — – OK
LED 1 chassis 42 1.0 - 1.1 V 1.127 – 1.2 - 1.5 V 1.4 – — – –
LED 2 chassis 26 1.116 – 1.39 – — – –
Detector: G106a DIB2 BH: Stripline: 20
SC: ZB1-4-4 300 K LN LHe
Face: 5 Date 2012-11-28 Date 2012-11-30 Date 2012-12-02
SQUET: ZC28 Who AK Who RR Who RR
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 4k OK 1 - 2 k 1.5 OK 80 - 140 116 OK
SQUID bias B/Ret 19 34 4.3k OK 1.5 OK 80 - 140 92 OK
SQUID bias C/Ret 8 24 4.9k OK 1.9 OK 80 - 140 222 OK
SQUID bias D/Ret 23 39 4.3k OK 1.6 OK 80 - 140 90 OK
Feedback A/Ret 37 21 15 - 25 k 23.6k OK 9 - 13 k 8.5 OK 1.0 - 1.3 k 1.2 OK
Feedback B/Ret 2 18 17.4k OK 7.2 OK 1.0 - 1.3 k 1.21 OK
Feedback C/Ret 41 25 20.8k OK 8.6 OK 1.0 - 1.3 k 1.38 OK
Feedback D/Ret 22 6 18.4k OK 7.2 OK 1.0 - 1.3 k 1.19 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 115, 100, 80, 84, 81 OK 30 - 40 50, 57, 37, 41, 38 OK 20 - 30 38, 38, 25, 28, 26 OK
QET B/Ret 35 29, 33, 47, 48 74, 73, 92, 74 OK 40, 39, 51, 39 OK 20 - 30 29,28,40,28 OK
QET C/Ret 7 5, 9, 10, 28 77. 72, 64, 72 OK 41, 37, 29, 36 OK 20 - 30 29,24,16,23 OK
QET D/Ret 38 36, 40, 43, 44 93, 72, 72, 72 OK 48, 38, 38, 38 OK 20 - 30 37, 27,26,27 OK
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.06k OK 1.0 - 1.1 k 1.051 OK 1.0 - 1.1 k 1.19 OK
Qi bias/QET Ret 15 24 - 26 nS 26 OK < 1 nS < 1 OK <1 nS <1 OK
Qo bias/QET Ret 11 26 OK < 1 OK <1 nS <1 OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 23 OK 6 - 8 nS 21 OK <1 nS 19 OK
Qo feedback/Drain/Source 30 12, 27 23 OK 21 OK <1 nS 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 .71 V OK 0.9 - 1.0 V 1.06 OK — – OK
LED 1 chassis 42 1.0 - 1.1 V 1.12 V – 1.2 - 1.5 V 1.4 – — – –
LED 2 chassis 26 1.11 V – 1.39 – — – –
Detector: G106a DIB3 BH: Stripline: 21
SC: ZB1-4-8 300 K LN LHe
Face: 6 Date 2012-11-28 Date 2012-11-30 Date 2012-12-02
SQUET: ZC70 Who AK Who RR Who RR
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 2k OK 80 - 140 119 OK
SQUID bias B/Ret 19 34 4.4k OK 1.7k OK 80 - 140 111 OK
SQUID bias C/Ret 8 24 4.6k OK 1.8k OK 80 - 140 110 OK
SQUID bias D/Ret 23 39 5.2k OK 2.1k OK 80 - 140 113 OK
Feedback A/Ret 37 21 15 - 25 k 29k OK 9 - 13 k 15 OK 1.0 - 1.3 k 1.2 OK
Feedback B/Ret 2 18 25k OK 9.2 OK 1.0 - 1.3 k 1.22 OK
Feedback C/Ret 41 25 28k OK 14.2 OK 1.0 - 1.3 k 1.2 OK
Feedback D/Ret 22 6 35k OK 17.4 OK 1.0 - 1.3 k 1.19 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 122, 113, 93, 97, 94 OK 30 - 40 60, 66, 48, 51, 49 OK 20 - 30 40, 41, 28, 32, 29 OK
QET B/Ret 35 29, 33, 47, 48 87, 86, 103, 86 OK 44, 43, 55, 43 OK 20 - 30 31, 30, 42, 30 OK
QET C/Ret 7 5, 9, 10, 28 89, 85, 76, 85 OK 49, 45, 36, 45 OK 20 - 30 32,27,18,27 OK
QET D/Ret 38 36, 40, 43, 44 108, 88, 87, 88 OK 58, 48, 47, 47 OK 20 - 30 39, 29, 28, 29 OK
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.066k OK 1.0 - 1.1 k 1.042 OK 1.0 - 1.1 k 1.2k OK
Qi bias/QET Ret 15 24 - 26 nS open OK < 1 nS open OK <1 nS open OK
Qo bias/QET Ret 11 open OK open OK <1 nS open OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 23 OK 6 - 8 nS 20,20 OK <1 nS 18,18 OK
Qo feedback/Drain/Source 30 12, 27 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 OPEN OK 0.9 - 1.0 V 1.084 OK — – OK
LED 1 chassis 42 1.0 - 1.1 V 1.12V – 1.2 - 1.5 V 1.39 – — – –
LED 2 chassis 26 1.10V – 1.39 – — – –
1350 Pump mixture to dump.
1355 Isolated IVC by closing valves at top of fridge. Isolated turbo pump.
1449 Sealed off dump. Start 1 K pot. Switched yellow valve to recovery and opened valve on wall.
1457 Mixing chamber temp. is 7.63 K. 1 K pot: 1.78 K. About 728 mbar in the dump.
1515 Begin condensing manually. Opened gate and condenser valves, and V1, V9, and V13A. When G2 rises close to 200 mbar, will close off V13A
1635 Pulled out about 450 mbar of mixture from dump to condense. Closed off V9. Slowly opening V12A.
1653 V12 opened all the way.
1917 Been waiting for the pressures in G1 and G2 rise. Also have lowered the 1 K pot temperature to 1.71 K in the meantime.
1951 That was stupid to wait, because why would it rise? Anyways, closed V3. Start automatic circulation process.
2003 V6 is all the way opened.