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2023/04/24 (Monday)

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  • Lab in-personnel: Zach
Status Run 78 Preparation. Tower Installation in progress. IVC open. Turbo valved out
1050 Check contents of warm LN2 Trap 1: 10.6 mbar (16.5 on G1). Pump it out with the scroll pump.
1059 G1 = 2.3 mbar and stable, stop pumping on Trap 1
1100 Insert cold trap 1 into and begin filling the LN2 cold trap dewar with LN2
1105 Begin cryocleaning mixture through cold trap 1 following the procedure in procedure:cryoclean_mixture
1110 Open V6 to 12.0% to restart flow
1115 Open V6 to 12.1% to restart flow
1135 Open V6 to 12.3% to restart flow
1250 End cryocleaning mixture through trap 1. Pump mixture to dump
1307 P1 = 0.09 mbar, G1 = 1.8 mbar and stable. Close all valves and turn off 3He pump, leaving 709.2 mbar in dump
1310 Remove cold trap 1 from the LN2 bath to warm up overnight
1314 Check contents of warm LN2 Trap 2: 1.9 mbar (3.8 on G1). Pump it out with the scroll pump.
1316 G1 = 2.5 mbar and stable, stop pumping on Trap 2
1318 Insert cold trap 2 into the LN2 cold trap dewar
1320 Begin cryocleaning mixture through cold trap 2 following the procedure in procedure:cryoclean_mixture
1325 Open V6 to 12.2% to restart flow
1342 Open V6 to 12.3% to restart flow
1402 Open V6 to 12.4% to restart flow
1435 End cryocleaning mixture through trap 2. Pump mixture to dump
1445 Clean edge of bottom IVC cap
1450 P1 = 0.08 mbar, G1 = 2.1 mbar and stable. Close all valves and turn off 3He pump, leaving 715.0 mbar in dump
1500 Prepare indium seal on bottom IVC cap (with light vacuum grease)
1505 Remove cold trap 2 from the LN2 bath to warm up overnight
Put covers over unused Tower faces 4 and 1. Attach all four 4K heat sinks
For DIB 1 (Face 5) install SQUET ZC-70+interposer connected to Stripline 41
1433 2nd Electrical check of ZC-70+interposer after connecting to Stripline 41 on Tower Face 5
Cooldown checkout sheet (rev C SQUET)
Detector: S104 Stripline 41
SC: none 300 K 300 K
Face: 5 Date 04/24/2023
SQUET: ZC-70 Cable 2
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
SQUID bias A/Ret 4 20 3 - 5 k — k OK
SQUID bias B/Ret 19 34 4.276 k OK
SQUID bias C/Ret 8 24 4.554 k OK
SQUID bias D/Ret 23 39 5.046 k OK
Feedback A/Ret 37 21 15 - 25 k 29.11 k OK
Feedback B/Ret 2 18 25.37 k OK
Feedback C/Ret 41 25 28.10 k OK
Feedback D/Ret 22 6 34.17 k OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 OL,93,OL, OL, OL OK
QET B/Ret 35 29, 33, 47, 48 72, 72, OL, OL OK
QET C/Ret 7 5, 9, 10, 28 75, 75, OL, OL OK
QET D/Ret 38 36, 40, 43, 44 74.2, 74.9, OL, OL OK
QET A/QET B 3 35 1000-3000 917 ohm
QET A/QET C 3 7 753
QET A/QET D 3 38 2154
QET B/QET C 35 7 579
QET B/QET D 35 38 2073
QET C/QET D 7 38 1915
LED 1 chassis 42 1.0 - 1.1 V 1.105
LED 2 chassis 26 1.69
Motor Coil 1 pBr3 pBr4 7.53 k
Motor Coil 2 pCr3 pCr4 7.47 k
Near Endstop pAr3 chassis 5.714 k
Far Endstop pAr4 chassis 22.49 k
Thermometer ROX pAr1 pDr4 1.139 k
1453 Electrical check of ZC-13 after connecting to Stripline 43 on Tower Face 2
Cooldown checkout sheet (rev C SQUET)
Detector: S104 Stripline 43
SC: none 300 K 300 K
Face: 2 Date 4/24/2023
SQUET: ZC-13 Cable 3
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
SQUID bias A/Ret 4 20 3 - 5 k 4.605 k OK
SQUID bias B/Ret 19 34 4.770 k OK
SQUID bias C/Ret 8 24 — k OK
SQUID bias D/Ret 23 39 4.884 k OK
Feedback A/Ret 37 21 15 - 25 k 18.85 k OK
Feedback B/Ret 2 18 19.91 k OK
Feedback C/Ret 41 25 — k OK
Feedback D/Ret 22 6 20.65 k OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 77.2, 72.3, 67.6, 68.7, 77.5 OK
QET B/Ret 35 29, 33, 47, 48 70.1, 70.2, 80.4, 70.1 OK
QET C/Ret 7 5, 9, 10, 28 72.2, 71.6, 60.5, 69 OK
QET D/Ret 38 36, 40, 43, 44 71.6, 69.1, 68.1, 68.5 OK
QET A/QET B 3 35 1000-3000 790
QET A/QET C 3 7 1669
QET A/QET D 3 38 1370
QET B/QET C 35 7 1796
QET B/QET D 35 38 1644
QET C/QET D 7 38 2072
1512 Electrical check of ZC-39 after connecting to Stripline 48 on Tower Face 3
Note: This SQUET need to slanted to make QET B working, seems to be affected by the angle between stripline head connector with the SQUET
Detector: S104 Stripline 48
SC: none 300 K 300 K
Face: 3 Date 4/21/2023
SQUET: ZC-39 Cable 1
Signal Pos. lead Gnd lead Nominal Actual Chassis
(Gnd lead)
Nominal:
< 0.1 nS
SQUID bias A/Ret 4 20 3 - 5 k 4.233 k OK
SQUID bias B/Ret 19 34 4.133 k OK
SQUID bias C/Ret 8 24 — k OK
SQUID bias D/Ret 23 39 — k OK
Feedback A/Ret 37 21 15 - 25 k 24.69 k OK
Feedback B/Ret 2 18 23.33 k OK
Feedback C/Ret 41 25 25.5 k OK
Feedback D/Ret 22 6 16.47 k OK
QET A/Ret 3 1, 13, 14, 17, 32 60 - 80 63, 64, 61, 61 64 OK
QET B/Ret 35 29, 33, 47, 48 83, 84, 84, 84 OK
QET C/Ret 7 5, 9, 10, 28 63, 64, 54, 63 OK
QET D/Ret 38 36, 40, 43, 44 59, 59, 59, 59 OK
QET A/QET B 3 35 1000-3000 1735
QET A/QET C 3 7 2535
QET A/QET D 3 38 2166
QET B/QET C 35 7 2626
QET B/QET D 35 38 2243
QET C/QET D 7 38 1079
1620 Found a short on SQUET during closing IVC. Tried to slightly re-tighten the SQUETS to see if that helps. Nope. + 1512 Electrical check of ZC-39 after connecting to Stripline 48 on Tower Face 3
1700 I started unplugging the SQUETS as the tower pins are showing the short. While unplugging the SQUID screws on ZC-70, it seem to have gone? Will look into this tomorrow

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