2017/03/16 (Thursday)
| 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 | |
| 0914 | Tower = 33.4 mK, Main Bath = 49.9%. Boil off rate: close to slow mode (predicted level: 48.4%). |
| 0915 | Fill LN2 cold trap bath. |
| 1555 | Finish IbIs for DCRC1pA/DIB1pA/Side1pE. New result suggests that Ib*prefactor, previously adjusted to 40 μA, has now shifted to 35 μA. According to this new IbIs the QET bias should be adjusted from 130.2 to 132.2 μA to achieve Ib*prefac = 40 μA. |
| 1606 | Commence LHe transfer (39.6%). |
| 1655 | End LHe transfer (91.9%). We used 2.0 PSI to pressurize the near-full 250L Dewar, and got a recovery meter rate during transfer of 5.9 cuft/min |
| 1703 | Fill LN2 cold trap full. |
| 1709 | Start sequence of 12, 1-hour data series of 1-sided 0V HV data with Frontend Gain = (20/20/20)/(-/4/3), OG = 4/2, QET biases = table above, with 1000 beginning randoms, no flashing, and a 15ADC bin threshold trigger on DCRC1 pA |
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