2021/12/24 (Friday)
- Lab in-personnel: Matt
| Status | Run 75 in progress |
|---|---|
| Setup | Tower Faces 5/3/2 → Cables 2/1/3 → nothing/diverter_board/nothing → DCRC55(1)/DCRC50(3)/DCRCx(4) Lead shield in place, S wall partially complete |
| 1105 | Goldman/Tower/MC(H35)/Coldplate = 48.2/94.7/36.5/214 mK, Still = 1.71±0.04 K / 0.130 mbar / 0 mW, G1/G2= 212/220 mbar, 1K Pot = 1.62 K / 19±1 mbar, MB = 59.4%. |
| 1110 | Fill LN2 cold trap bath. |
| 1110 | Perform mini-IbIs on DCRC1pA. The QET bias had been set to 241 uA to target a dP/dI of 1.0 uV, based on IbIs data from a couple weeks ago when the fridge was warmer. IbIs now suggests a dP/dI of 0.87 uV. |
| 1115 | Perform mini-IbIs on DCRC1pA around 277 uA, which would give dP/dI of 1.0 if the prefactor didn't change. But this gives much higher dP/dI, 5.42 uV. |
| 1120 | More mini-IbIs on DCRC1pA reveals dP/dI of 1.0 uV at QET bias around 252 uA. |