| Status: | Bath close to empty. Both LN traps at room temperature and pumped out. He exchange gas in IVC. |
| 0900 | MC (Cernox) = 19.7 K, Sorb = 34.4 K, 1K Pot = > 7 K, IVC > 1 bar |
| | Not sure about the IVC pressure. The Pfeiffer gauge on the turbo stand reads >1e3 mbar. However, when I open the valve to the mechanical gauge at the He fill, it shows good vacuum, ~-30 inHg. That suggests less than 50 mbar for sure. MC is 4.4X warmer than yesterday suggesting IVC pressure should be 4.4×4.6 mbar = 20 mbar. |
| 0910 | Check bath fill port: there's still pressure. There must still be some LHe. |
| 1520 | MC (Cernox) = 60 K, Sorb = 109 K. IVC still shows low pressure on analogue gauge. Bath still has pressure. |
| 1525 | Open V1 to view LHe Cold Trap contents on G1. Pressure rises from 2 mbar to 160 mbar. Lots of air in the trap. |
| 1615 | MC (Cernox) = 65 K, Sorb = 118 K. G1 (LHe trap) = 164 mbar. Trap pressure increasing as fridge warms, of course. |
| 1615 | Close V1. We'll leave the released air in the G1 part of the GHS, then later open V1 again and get a room temperature reading. |