UMN CDMS Wiki archive
start › cdms › k100 › run_diary › 20110125

2011/01/25

1400 Stop pumping IVC at pressure of 7.4E-6 mbar
Background leak rate of 1E-8 mbar l/s
Pump dewar and flush with He gas: leak rate of 1.2E-8 mbar l/s
1500 Evacuate 1 K pot
1510 Flood IVC with 4.6 mbar of N2 exchange gas (35 mbar prior to isolating IVC)
1645 Begin LN2 transfer
1900 Electrical check at 220 K

Electrical Checks

Cooldown checkout sheet (rev C SQUET)
Detector: G9 BH: Stripline: 19
SC: ZB1-4-6 220 K LN LHe
Face: 2 Date 2011-01-25 Date 2011-01-26 Date
SQUET: ZC23 Who HC Who HC Who
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 2.7 OK 1 - 2 k 1.6 OK 80 - 140
SQUID bias B/Ret 19 34 3.2 OK 2 OK 80 - 140
SQUID bias C/Ret 8 24 2.9 OK 1.7 OK 80 - 140
SQUID bias D/Ret 23 39 2.7 OK 1.6 OK 80 - 140
Feedback A/Ret 37 21 15 - 25 k 12 OK 9 - 13 k 7.3 OK 1.0 - 1.3 k
Feedback B/Ret 2 18 13 OK 8.2 OK 1.0 - 1.3 k
Feedback C/Ret 41 25 12 OK 7.6 OK 1.0 - 1.3 k
Feedback D/Ret 22 6 12 OK 7.1 OK 1.0 - 1.3 k
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 54,49,46,47,47 OK 30 - 40 50,45,43,44,44 OK 20 - 30
QET B/Ret 35 29, 33, 47, 48 48,48,52,48 OK 45,45,49,45 OK 20 - 30
QET C/Ret 7 5, 9, 10, 28 48,46,35,45 OK 45,43,33,42 OK 20 - 30
QET D/Ret 38 36, 40, 43, 44 46,46,45,45 OK 43,43,42,43 OK 20 - 30
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.036 OK 1.0 - 1.1 k 1.042 OK 1.0 - 1.1 k
Qi bias/QET Ret 15 24 - 26 nS 40 M OK < 1 nS OK OK <1 nS
Qo bias/QET Ret 11 39 M OK OK OK <1 nS
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 48 M, 48 M OK 6 - 8 nS 50 M, 49 M OK <1 nS
Qo feedback/Drain/Source 30 12, 27 48 M, 48 M OK 50 M, 49 M OK <1 nS
Qi drain 16 chassis < 0.1 nS – OK < 0.1 nS – OK <0.1 nS –
Qo drain 12 chassis – OK – OK <0.1 nS –
Qi source 31 chassis – OK – OK <0.1 nS –
Qo source 27 chassis – OK – OK <0.1 nS –
FET Tsense +/FET heater- 49 46 0.6 - 0.7 V 1.03 OK 0.9 - 1.0 V 1.089 OK —
LED 1 chassis 42 1.0 - 1.1 V 1.231 – 1.2 - 1.5 V 1.491 – — –
LED 2 chassis 26 1.221 – 1.497 – — –
Cooldown checkout sheet (rev C SQUET)
Detector: G8 BH: Stripline: 20
SC: ZB1-5-1 220 K LN LHe
Face: 6 Date 2011-01-25 Date 2011-01-26 Date
SQUET: ZC70 Who HC Who HC Who
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 3 OK 1 - 2 k 2 OK 80 - 140
SQUID bias B/Ret 19 34 2.6 OK 1.7 OK 80 - 140
SQUID bias C/Ret 8 24 2.9 OK 1.8 OK 80 - 140
SQUID bias D/Ret 23 39 3.6 OK 2.1 OK 80 - 140
Feedback A/Ret 37 21 15 - 25 k 20 OK 9 - 13 k 15 OK 1.0 - 1.3 k
Feedback B/Ret 2 18 15 OK 9 OK 1.0 - 1.3 k
Feedback C/Ret 41 25 20 OK 14 OK 1.0 - 1.3 k
Feedback D/Ret 22 6 24 OK 17 OK 1.0 - 1.3 k
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 52,47,45,45,45 OK 30 - 40 49,44,41,42,42 OK 20 - 30
QET B/Ret 35 29, 33, 47, 48 42,41,45,41 OK 38,37,41,37 OK 20 - 30
QET C/Ret 7 5, 9, 10, 28 44,42,35,42 OK 41,39,32,39 OK 20 - 30
QET D/Ret 38 36, 40, 43, 44 46,46,45,45 OK 43,42,42,42 OK 20 - 30
Charge
FET heater +/- 45 46 1.0 - 1.1 k 1.034 OK 1.0 - 1.1 k 1.039 OK 1.0 - 1.1 k
Qi bias/QET Ret 15 24 - 26 nS 39 M OK < 1 nS OK OK <1 nS
Qo bias/QET Ret 11 39 M OK OK OK <1 nS
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 49 M, 49 M OK 6 - 8 nS 50 M, 50 M OK <1 nS
Qo feedback/Drain/Source 30 12, 27 49 M, 49 M OK 50 M, 50 M OK <1 nS
Qi drain 16 chassis < 0.1 nS – OK < 0.1 nS – OK <0.1 nS –
Qo drain 12 chassis – OK – OK <0.1 nS –
Qi source 31 chassis – OK – OK <0.1 nS –
Qo source 27 chassis – OK – OK <0.1 nS –
FET Tsense +/FET heater- 49 46 0.6 - 0.7 V 1.026 OK 0.9 - 1.0 V 1.081 OK —
LED 1 chassis 42 1.0 - 1.1 V 1.265 – 1.2 - 1.5 V 1.904 – — –
LED 2 chassis 26 1.26 – 1.958 – — –
2030 Stop LN2 transfer
2100 Fill cold trap full
2130 Cryoclean mixture overnight: G1 = 492 mbar; G2 = 514 mbar; V6 open 13.0%