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2020/06/24 (Wednesday)

Previous Day

  • Lab in-person: Matt
  • Virtual partner: Monica Sheets
0910 Matt Fritts body temperature = 97.0 F
0940 Matt arrives in lab
0950 Turbo on IVC = 12 nbar. With Turbo valved out for 5 minutes, IVC = 0.74 ubar.
0953 Start filling IVC slowly with N2
1020 IVC at 1atm. Remove clamp from KF flange at stripline elbow, we'll try again to improve the seal.
1035 Carefully polish flange surfaces with a piece of ScotchBrite, making sure to rub in a circular direction, never radially.
1045 Clean metal surfaces with methanol and wipes. Feel for any debris on o-ring and try to remove with fingers. Put thin layer of vac grease on o-ring. Reattach KF flange. Replace the clamp with a spare - this one seems to tighten better.
1047 Start gently pumping out IVC with Scroll Pump
1058 IVC pumping pressure falls below 0.1 mbar, switch to pumping with Turbo Pump
1105 Turbo on IVC = 0.25 ubar
1110 Leak check around stripline elbow KF flange and top of stripline elbow. No leak seen. Signal stayed around 60 pbarL/s.
1105 Turbo on IVC = 0.16 ubar
1120 Turbo on IVC = 0.12 ubar
1120 Matt leaves lab
1238 Matt Fritts body temperature = 98.2 F

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