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2011/11/15

1015 IVC pressure 3e-5mbar. Tightened the bottom Indium seal again.
1025 IVC pressure 2.5e-5mbar.
1355 Conduct electrical check at room temperature. Apart from expected Qi (DIB2) & Qo (DIB2) shorts to ground, everything looks good.
Detector: G21A DIB1 BH: Stripline: 20
SC: ZB1-4-6 300 K
Face: 5 Date 2011-11-15
SQUET: ZC70 Who HC
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
SQUID bias A/Ret 4 20 3 - 5 k 4.8 OK
SQUID bias B/Ret 19 34 4.4 OK
SQUID bias C/Ret 8 24 4.6 OK
SQUID bias D/Ret 23 39 5.2 OK
Feedback A/Ret 37 21 15 - 25 k 29 OK
Feedback B/Ret 2 18 25 OK
Feedback C/Ret 41 25 28 OK
Feedback D/Ret 22 6 34 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 94,88,80,83,80 OK
QET B/Ret 35 29, 33, 47, 48 77,77,81,77 OK
QET C/Ret 7 5, 9, 10, 28 76,76,69,76 OK
QET D/Ret 38 36, 40, 43, 44 85,80,80,80 OK
FET heater +/- 45 46 1.0 - 1.1 k 1.06 OK
Qi bias/QET Ret 15 24 - 26 nS Open OK
Qo bias/QET Ret 11 Open OK
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 43 MOhm OK
Qo feedback/Drain/Source 30 12, 27 43 MOhm OK
Qi drain 16 chassis < 0.1 nS – OK
Qo drain 12 chassis – OK
Qi source 31 chassis – OK
Qo source 27 chassis – OK
FET Tsense +/FET heater- 49 46 0.6 - 0.7 V Open OK
LED 1 chassis 42 1.0 - 1.1 V 1.132 –
LED 2 chassis 26 1.124 –
Detector: G21A DIB2 BH: Stripline: 19
SC: ZB1-4-8 300 K
Face: 2 Date 2011-11-15
SQUET: ZC23 Who HC
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
SQUID bias A/Ret 4 20 3 - 5 k 4.4 OK
SQUID bias B/Ret 19 34 5 OK
SQUID bias C/Ret 8 24 4.6 OK
SQUID bias D/Ret 23 39 4.3 OK
Feedback A/Ret 37 21 15 - 25 k 18 OK
Feedback B/Ret 2 18 20 OK
Feedback C/Ret 41 25 19 OK
Feedback D/Ret 22 6 18 OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 98,92,86,89,87 OK
QET B/Ret 35 29, 33, 47, 48 87,86,90,87 OK
QET C/Ret 7 5, 9, 10, 28 84,84,74,84 OK
QET D/Ret 38 36, 40, 43, 44 87,84,84,84 OK
FET heater +/- 45 46 1.0 - 1.1 k 1.068 OK
Qi bias/QET Ret 15 24 - 26 nS Open 40 MOhm (Qi bias)
Qo bias/QET Ret 11 Open 39 MOhm (Qo bias)
Qi feedback/Drain/Source 50 16, 31 15 - 17 nS 44 MOhm OK
Qo feedback/Drain/Source 30 12, 27 44 MOhm OK
Qi drain 16 chassis < 0.1 nS – OK
Qo drain 12 chassis – OK
Qi source 31 chassis – OK
Qo source 27 chassis – OK
FET Tsense +/FET heater- 49 46 0.6 - 0.7 V 0.727 OK
LED 1 chassis 42 1.0 - 1.1 V 1.134 –
LED 2 chassis 26 Open –
1835 IVC pressure 2.2E-5 mbar.
Raise dewar. Pump and flush dewar. Evacuate 1 K pot.
Fill IVC with 4.6 mbar N2 exchange gas. Start nitrogen transfer.
2010 Nitrogen transfer completed. Attach ping-pong ball.
2110 Fill N2 cold trap full.
2125 Start cryocleaning mixture through nitrogen cold trap 2. Open valve 6 to 14.1%.
2140 Flow rate through cold trap is a little too fast. Close valve 6 to 13.9%.