2025/07/25 (Friday)
- Lab in-personnel: Himangshu, Yan
| Status | Trap warmed up to room temperature this morning. |
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| 10:30 | Open V3. Reading pressure ~25 mBar. Use the scroll to pump out the trap. |
| 11:00 | starting another round of cryocleaning. |
| 12:10 | collecting mix into the dump. |
| 12:50 | Heat gun on trap, reading ~10 mbar. Use the scroll to pump out the trap. |
| 1300 | cold trap 1 in LN2 can. |
| Pump out fridge lines: |
- Make sure mixture is isolated in the dump.
- Check fridge pressures by opening condenser speedivalve+V1 and still gate valve: LHe trap+Condenser(G1)/Still(P1) = (47.5-2.4=) 45.1/0.13 (1.2-0.07)) mbar.
- Connect scroll pump to He-4 pump line, turn it on.
- Open pump line valve, V5A, V2A, V7, V2, wait a minute, then open V3.
- You're now pumping on the fridge lines. Wait until P1 and G1 flatten out.
- Close condenser speedivalve and still gate valve, V1, V3, V2, V7, V2A, V5A and close and turn off the scroll pump.
| 1330 | P1 takes a long time to lower down as the Still is a big bellow while V5 is a thin line. P1 still falling. Reconnected with Leak detector to use as a pump (vane pump will be more effective). Kept pumping overnight and Stopped at P1 ~ 300 mTorr |
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