2021/11/17 (Wednesday)
- Lab in-personnel: Matt
| Status | Beginning Run 75. |
|---|---|
| 1K Pot isolated. MB raised. Cryostat vacuum jacket (CVJ) pumped out. | |
| 1130 | Check contents of warm LN2 Trap 1: 8.5 mbar. Pump out with Scroll Pump. |
| 1135 | Check contents of warm LN2 Trap 2: 6.1 mbar. Pump out with Scroll Pump. |
| 1155 | Start cryocleaning mixture through LN2 Cold Trap 1, V6 = 12.3% |
| 1200 | Increase V6 → 12.6% to restart flow |
| 1300 | Stop cleaning through Trap 1 after 65 min. G2 flow pressure was 580-810 mbar. Pump mixture to dump. Removed 3.5 mbar. |
| 1340 | Start cryocleaning mixture through LN2 Cold Trap 2, V6 = 12.7% |
| 1350 | Increase V6 → 12.9% to restart flow |
| 1452 | Stop cleaning through Trap 2 after 62 min. G2 flow pressure was 590-760 mbar. Pump mixture to dump. Removed 7.5 mbar. |
| 1510 | Check contents of mostly warm LN2 Trap 1: 3.5 mbar. Let's wait and see if it goes up, it may still be a little colder than RT. |
| 1600 | We've been letting the trap sit in lukewarm water, pressure hasn't changed much. |