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2021/01/29 (Friday)

Previous Day

  • Lab in-person: Matt
  • Virtual partner: Zach
Status Run 74 prep. 1K Pot pumped out and isolated. Fridge and 4He and LN2 Trap 1 isolated, not pumped out. Cryostat vacuum jacket pumped out. IVC sealed and pumping overnight.
Tower installed yesterday, turbo pumping IVC overnight.
1550 Matt enters lab
1555 Turbo on IVC = 40 nbar
1600 Quick electrical check at breakout box on both DIBs. Everything looks OK.
1610 Tighten IVC bottom screws some more.
1630 Take down clean tent and store it in pump alley
1645 Check contents of warm LN2 Trap 1/2: 27/4.8 mbar. Pump out both with Scroll Pump
1710 Check fridge pressures: LHe trap/Condenser/Still = 58.0/0.5/0.8 mbar. Pump out with Scroll Pump
1650 Warm up leak detector and connect to IVC, valve out Turbo pump. LD settles around 6 pbarL/s. Squirt helium at all IVC joints, above and below fridge stand. No increase in leak signal, surprisingly not even at the stripline elbow.
1715 Matt exits lab

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