| | 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) |
| | overnight: base temperature stable, 1K Pot drifting down |
| 0635 | Tower = 30.0 mK |
| 0648 | Start sequence of 12 30-minute background (+PuBe) data series at HV = 70V, Driver Gains = 2x, QET biases = 280/260/305/135/290/300 uA, Front-End Gains = 10, 1000 initial randoms, trigger on DCRC3pB/C/D threshold = 8/16/16, flashing then waiting 30min after each series, using sequencer script DataLoop_70V_30min_groundflash_30min. Leakage currents ~ 10 mV ⇒ V_cry ~ 66 V. Voltages logged in /data/chocula/k100/k100_log/20180630_log.txt |
| 0700 | Tower = 30.0 mK, G1/G2 = 108/115 mbar, Still = 0.075 mbar / 1.5 mW, 1K Pot = 1.43 K / 3.6 mbar |
| 1145 | Fill LN2 cold trap full. |
| 1150 | Tweak 1K Pot needle valve 20 degrees. P2 pressure rises off-scale and the 1K Pot temperature peaked around 1.9 K before falling. |
| 1200 | Tower = 28.3 mK. |
| 1350 | Tower = 29.9 mK, G1/G2 = 140/140 mbar, Still = 0.095 mbar / 1.5 mW, 1K Pot = 1.56 K / 11 mbar |
| 2225 | Tower = 30.0 mK, G1/G2 = 110/115 mbar, Still = 0.090 mbar / 1.5 mW, 1K Pot = 1.50 K / 5.5 mbar |