2022/04/10 (Sunday)
- Lab in-personnel: Matt, Nikki
| Status | Run 76 in progress |
|---|---|
| Setup | Cable 2/1/3 → diverter/nothing/nothing → HV CONN1/2/3 → DCRC55(1)/DCRC50(3), NaI trigger signal → DCRC52(6) actually discovered later that Cables 1&3 were swapped. |
| 1210 | MC/Coldplate = 27.7/140 mK, Still = 1.12 K / 0.110 mbar / 0 mW, G1/G2= 159/163 mbar, 1K Pot = 18° / 1.61 K / 19±2 mbar |
| 1419 | Begin LHe transfer @ MB = 26.4% |
| 1506 | End LHe transfer @ MB = 85.7% |
| Note: we waited at the end of the transfer with both sides of the transfer line raised high, waiting for the pressure to fall. Last time with the 250L Dewar we only waited 5 minutes - this time we waited 15 minutes. But the pressure still seemed quite high when we finally removed the transfer line. | |
| In the end however, the recovery efficiency looked pretty good. | |
| 1520 | Fill LN2 cold trap bath |