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2021/05/09 (Sunday)

Previous Day

  • Lab in-person: Matt
  • Virtual partner: Monica
Status Run 74 in progress. Warming up after 3rd appearance of IVC leak at 4K. Helium in Cryostat Vacuum Jacket. Mixture in dump.
1040 MC = 265 K, rising 1.2 K/hr, suggests warming tau = 25.3 hrs, projected to reach dew point tonight at 7:26 PM
1945 Matt enters lab
1950 MC(Cernox) = 274.8 K
1950 Check IVC pressure: 0.58 bar.
1955 Slowly fill IVC with N2 gas to 0.96 bar. Isolate IVC.
2005 Check pressure in Cryostat Vacuum Jacket: 0.3 mbar. Start pumping out with Scroll Pump. @ < 0.1 mbar switch to Turbo Pump.
2020 Remove all MB bolts
2020 Matt exits lab

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