2021/11/03 (Wednesday)
- Lab in-personnel: Matt, Derek, Giulia, Himangshu
| Status | Beginning Run 75. |
|---|---|
| 1K Pot isolated. MB in pit. Cryostat vacuum jacket (CVJ) pumped out. | |
| Leak checked IVC yesterday, looks good. Pumping IVC overnight. Electrical checks good. | |
| 1450 | Store clean tent in pump alley |
| 1510 | Raise main bath |
| 1515 | Turbo on IVC = 54 nbar. With Turbo valved out for 1 minute, IVC = 630 nbar. |
| 1525 | Check contents of warm LN2 Trap 1: 9.7 mbar. Pump out with Scroll Pump. |
| 1545 | Start cryocleaning mixture through LN2 Cold Trap 2, V6 = 12.5% |
| 1555 | Increase V6 → 12.8% to restart flow |
| 1600 | G2 peaked at 750 then fell a bit, but then started rising again, approached 1000 mbar so we closed V6, will start over. |
| 1605 | Set V6 → 12.7% to reestablish flow |
| 1725 | Stop cleaning through Trap 2 after 80 min. G2 flow pressure was 560-880 mbar. Pump mixture to dump. Removed 15.7 mbar. |