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Teleconference link: https://umn.zoom.us/j/9024497080?omn=95322888432
Meeting ID: 902 449 7080
Domestic: 1-408-638-0968 (US toll)
Access code:
  • Lab Update
    • Resealed IVC bottom and LN2 transfer on Friday.
    • No electrical issues seen at room temperature or 77K.
    • LHe transfer over weekend. Started 1K pot and started circulation.
    • MC reached 4.45K, Still at 6K when we started pumping out 1K pot.
    • Tower lowest temp 190mK, Still and 1K both stuck at 1.96K.
    • IVC leak rate in 10e-4 mbarL/s. Stopped circulation and 1K pot pumping.
    • Suspected leak rate source: outgassing.
    • Suspected high Still temp: Still heater lines.
    • Removed connections to Still heater lines caused sharp fall in Still temp (25K to 20K) in a few minutes.
    • Pumping IVC overnight. Still: 5.3K, 1K pot: 6.4K, MC:5K this morning.
  • Priority Updates
  • /data/chocula files deletion issue. Did anyone run rm -rf * command on Friday at 4pm? Last known good image requested to be restored.
  • General Updates
    • Himangshu
    • Shubham
    • Zach
    • Elliott
    • Scott