2018/07/11 (Wednesday)
| Setup: DIB1/3/4 → 3.2 MHz filters 2/3/1 → cable 3/1/2 → gender changer 3/?/2 → HVConn 1/3/2 → HV 1/2 → DCRC55(1)/DCRC50(3) | |
| 1421 | Fill LN2 cold trap full. |
| 1421 | Tower = 32.7 mK, G1/G2 = 228.7/212.7, P1 = 0.150 mbar, 1K pot = 1.622 K / 24 mbar. MB = 21.8%. |
| 1508 | Start LHe transfer (MB = 21.8%) |
| 1557 | End LHe transfer (MB = 90.7%) |
| 1626 | Tower = 33.1 mK, G1/G2 = 125.0/122.1, P1 = 0.100 mbar, 1K pot = 1.608 K / 26 mbar. MB = 90.4%. |
| Condenser pressure is down since transfer, suggesting that maybe the fridge is working better than before. But base temp is worse; also still pressure is low, maybe it needs more heat. |
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| 1700 | Increase Still heater 2.0→4.0 mW. Still → 0.13 mbar. Base temp goes down, condenser pressure goes up a bit… |
| 1750 | Tower = 32.3 mK, a little better than before transfer. G1/G2 = 141/137 mbar, Still = 0.13 mbar. |