| | Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 |
| 0920 | Tower/MC/Coldplate = 33.3/30.8/194 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 248/231 mbar, 1K Pot = 1.691 K / 28 mbar, Main bath = 39.7%. Boil off rate: close to slow mode (predicted level: 40.8%). |
| 0920 | Fill LN2 cold trap full. |
| 1440 | Try experiment of heating still and watching phonon baseline, DCRC1pC (driver gain x4). Applied 10 mW to still. Still P increases from 0.12 to 0.24 mbar. Base temperature goes up but then comes down. Baseline seems to track tower temperature. Baseline goes up from -0.75 V to around -0.6 V as Tower increases from 33 to 39 mK. Then Tower falls again, turn off still heat, tower falls more. Tower minimum of 31 mK, then baseline falls to minimum -0.83 V. Both baseline and Tower settle to original values after about 10 minutes. Baseline shifts by about 40 mV per mK (0.4 μA per mK). |
| 1510 | Start LHe transfer (MB = 29.7%) |
| 1602 | End LHe transfer (MB = 90.9%) |
| 1753 | Fill LN2 cold trap. |