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2021/12/16 (Thursday)

Previous Day

  • Lab in-personnel: Matt, Himangshu
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)
1115 Goldman/Tower/MC/Coldplate = 50.0/91.3/36.7/219 mK, Still = 1.67±0.04 K / 0.130 mbar / 0 mW, G1/G2= 184/181 mbar, 1K Pot = 1.64 K / 21±2 mbar. MB = 67.6%
Coldplate and Still thermometers are still reading high, still thermometer reading not very stable.
Goldman thermometer is now cooler than its calibrated range. The temperature above is based on an extrapolation of the coldest 5 points in the calibration curve. I fit 1/T versus R to a quadratic equation to fit the data.
1120 Fill LN2 cold trap bath.
1150 Modify Omni_LoggerCopy.vi to include the extrapolation of the Goldman thermometer

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