2021/11/19 (Friday)
- Lab in-personnel: Matt
| Status | Beginning Run 75. |
|---|---|
| 1K Pot isolated. MB raised. Cryostat vacuum jacket (CVJ) pumped out. | |
| 1405 | Check contents of warm LN2 Trap 1: 5.4 mbar. Pump out with Scroll Pump. |
| 1425 | Start cryocleaning mixture through LN2 Cold Trap 2, V6 = 12.6% |
| 1436 | Increase V6 → 12.7% to restart flow |
| 1451 | Increase V6 → 12.8% to restart flow |
| 1514 | Increase V6 → 12.9% to restart flow, peaks at G2 preassure of 772 mbar. |
| 1600 | Stop cleaning through Trap 2 after 115 min. G2 flow pressure was 570-790 mbar. Pump mixture to dump. Removed 79.4 mbar, apparently. Or maybe the Trap2 lines are leaky? It was sitting over the weekend. |
| 1625 | Turn off 3He pump. |