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2021/09/29 (Wednesday)

Previous Day

  • Lab in-personnel: Matt
Status Run 74 finished. Warming up.
All mixture is in dump. Fridge isolated. 1K Pot isolated. LN2 Trap 2 still has contaminants in it. He and LN2 in IVC and in cryostat vacuum jacket (CVJ)
1100 MC(Cernox) = 246.2 K, rising 2.55 K/hr. Implies tau_warming = 19.1 hours. Predicted to reach dew point 7 C in 22.7 hours = tomorrow (Thursday) at 9:40 am
1430 MC(Cernox) = 254.0 K, rising 2.0 K/hr. Implies tau_warming = 21.6 hours. Predicted to reach dew point 7 C in 20.3 hours = Friday at 10:45 am
1735 MC(Cernox) = 260 K. Cryostat Vacuum Jacket (CVJ) = 0.54 mbar.
1740 Start pumping out CVJ with Scroll Pump. At 0.1 mbar switch to Turbo Pump.

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