2025/07/24 (Thursday)
- Lab in-personnel: Himangshu, Yan
| Status | 1K valve leak checked and leak rate < 1e-6 mbar L/s. Pumped out IVC and CVJ overnight. |
|---|---|
| 1411 | Cryocleaning ongoing. Contaminants from yesterday ~ 150 mbar. Pumped out with scroll pump. Restarted another cycle |
| 1412 | Reconnect exchange gas port to turbo pump Tee assembly. |
| 15xx | Fixed the main bath He level meter. the power button needs to be pulled out before pressed in. Also, resoldered the V– wire on the DB9 connector. |
| 1622 | Collected mixture. Heat gun on the cold trap. reading ~200 mbar. Pumped out with scroll. Doing another cycle |
| 1822 | Collected mixture. Heat gun on the cold trap. reading ~100 mbar. Pumped out with scroll. |
| 17xx | Flushed main bath and 1k pot with helium to 500 mbar. pumped out to <1 mbar with scroll. |
| 1830 | Flushed main bath and 1k pot with helium to 500 mbar again. pumped out to < 1 mbar with scroll. |
| 1840 | Put >1 bar of helium in bath and pot for overpressure overnight. Closed main bath valve, speedivalve, and needlevalve. |
| 1855 | Doing another cycle of cryocleaning. |
| 1900 | Also did electrical continuity check for all three cables (see results below). Only did squid/feedback/qet check. Did not do LED, heater, source mover check. |
| 2000 | Pump mixture back into the dump. Closed V3, V5, and V2. Turn off circulation pump. Took out the cold trap and let it warm to room temperature. |
| 17xx | Starting electric check. | ||||
|---|---|---|---|---|---|
| Detector: | S104 | Stripline | 48 | ||
| SC: | none | 300 K 300 K | |||
| Face: | 3 | Date | 07/24/2025 | ||
| 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 | 4.2 k | OK |
| SQUID bias B/Ret | 19 | 34 | 3.96 k | OK | |
| SQUID bias C/Ret | 8 | 24 | — k | 20 nS | |
| SQUID bias D/Ret | 23 | 39 | — k | OK | |
| Feedback A/Ret | 37 | 21 | 15 - 25 k | 24.58 k | 65 nS |
| Feedback B/Ret | 2 | 18 | 23.21 k | OK | |
| Feedback C/Ret | 41 | 25 | 25.40 k | short | |
| Feedback D/Ret | 22 | 6 | 16.39 k | 35 nS | |
| QET A/Ret | 3 | 1, 13, 14, 17, 32 | 60 - 80 | 119, 65, 61, 63, 63 | ? |
| QET B/Ret | 35 | 29, 33, 47, 48 | 78, 77, 119, 79 | ? | |
| QET C/Ret | 7 | 5, 9, 10, 28 | 106, 67, 57, 104 | ? | |
| QET D/Ret | 38 | 36, 40, 43, 44 | 75, 75, 75, 75 | ? | |
| QET A/QET B | 3 | 35 | 1000-3000 | 1984 | |
| QET A/QET C | 3 | 7 | 2662 | ||
| QET A/QET D | 3 | 38 | 2393 | ||
| QET B/QET C | 35 | 7 | 2767 | ||
| QET B/QET D | 35 | 38 | 2482 | ||
| QET C/QET D | 7 | 38 | 1496 | ||
| 1557 | Electrical check of ZC-70+interposer | ||||
|---|---|---|---|---|---|
| Cooldown checkout sheet (rev C SQUET) | |||||
| Detector: | S104 | Stripline | 41 | ||
| SC: | none | 300 K 300 K | |||
| Face: | 5 | Date | 07/24/2025 | ||
| 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 | 4.3 k | 5 Mohm, Squid and Feedback is shorted by 6 kOhm | |
| SQUID bias C/Ret | 8 | 24 | 4.5 k | 4 Mohm, Squid and Feedback is shorted by 9 Mohm | |
| SQUID bias D/Ret | 23 | 39 | 5.0 k | OK | |
| Feedback A/Ret | 37 | 21 | 15 - 25 k | – k | OK |
| Feedback B/Ret | 2 | 18 | 25.0 k | 5 Mohm | |
| Feedback C/Ret | 41 | 25 | 28 k | 6 Mohm | |
| Feedback D/Ret | 22 | 6 | 34 k | OK | |
| QET A/Ret | 3 | 1, 13, 14, 17, 32 | 60 - 80 | OL, 95, OL, OL, OL | 4 Mohm |
| QET B/Ret | 35 | 29, 33, 47, 48 | 108, 100, OL, OL | 4 Mohm | |
| QET C/Ret | 7 | 5, 9, 10, 28 | 109, 79, OL, OL | 4 Mohm | |
| QET D/Ret | 38 | 36, 40, 43, 44 | 79, 80, OL, 4 Mohm | 4 Mohm | |
| QET A/QET B | 3 | 35 | 1000-3000 | 17.9 kohm | ??? |
| QET A/QET C | 3 | 7 | 800 | ||
| QET A/QET D | 3 | 38 | 1947 | ||
| QET B/QET C | 35 | 7 | 17.4 kOhm | ??? | |
| QET B/QET D | 35 | 38 | 18.8 kOhm | ??? | |
| QET C/QET D | 7 | 38 | 1691 | ||
| LED 1 | chassis | 42 | 1.0 - 1.1 V | 1.105 | |
| LED 2 | chassis | 26 | 1.094 | |
|
| Motor Coil Y1 | pBr3 | pBr4 | 0.249 k | ||
| Motor Coil Y2 | pCr3 | pCr4 | 0.194 k | ||
| Motor Coil X1 | pAr3 | pAr4 | 0.186 k | ||
| Motor Coil X2 | pAr5 | pDr3 | 0.171 k | ||
| Xendstop | pAr1 | chassis | open | ||
| Yendstop | pDr4 | chassis | 72 ohm | ||
| 1931 | 3rd 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 | 07/24/2025 | ||
| 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 | 4.584 k | 39 nS |
| SQUID bias B/Ret | 19 | 34 | 4.758 k | OK | |
| SQUID bias C/Ret | 8 | 24 | — k | OK | |
| SQUID bias D/Ret | 23 | 39 | 4.881 k | OK | |
| Feedback A/Ret | 37 | 21 | 15 - 25 k | 18.78 k | OK |
| Feedback B/Ret | 2 | 18 | 19.84 k | OK | |
| Feedback C/Ret | 41 | 25 | — k | OK | |
| Feedback D/Ret | 22 | 6 | 20.58 k | OK | |
| QET A/Ret | 3 | 1, 13, 14, 17, 32 | 60 - 80 | 128.7, 76.5, 72.6, 72.9, 86.3 | 4 Mohm |
| QET B/Ret | 35 | 29, 33, 47, 48 | 89.6, 90.0, 149.1, 89.8 | 4 Mohm | |
| QET C/Ret | 7 | 5, 9, 10, 28 | 94.2, 74.6, 63.8, 72.1 | 4 Mohm | |
| QET D/Ret | 38 | 36, 40, 43, 44 | 86.4, 75.3, 74.2, 74.6 | 4 Mohm | |
| QET A/QET B | 3 | 35 | 1000-3000 | 1652 | |
| QET A/QET C | 3 | 7 | 2005 | ||
| QET A/QET D | 3 | 38 | 1712 | ||
| QET B/QET C | 35 | 7 | 1860 | ||
| QET B/QET D | 35 | 38 | 1791 | ||
| QET C/QET D | 7 | 38 | 2142 | ||