December 18, 2022

RC Meeting Information

RC Daily Meetings are at 11:00 (am) via Zoom and in person in the counting house meeting room (2nd floor)

• Zoom remote connection information:

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 Meeting ID: 160 710 0885
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Useful Links

• Shift Signup (Read only)
  • Shift Signup

• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Current Status

• Hall C is currently down due to another PSS error that suddenly put Hall C in restricted access.
  • Expert on-call unable to solve issue.
  • Experts came in at 8:00 AM
  • PD meeting scheduled for 9AM to discuss further
    • Verbal report at the meeting: hardware has been replaced and is being tested and hopefully will be back up before noon.
  • Going to attempt to sweep and arm and go back to beam permit 10:45 AM
• Shift Summaries
  • Day 12/17
  • Swing 12/17
  • Owl 12/18

• Today
  • When beam comes back, continue with the run plan on Setting 2.

• Yesterday
  • Changed to Setting 2 of HMS high x at 35 degrees at the start of swing shift.
  • Smooth running until 1L21 cavity dropping at 00:20, followed by PSS error
  • HCDESK 4 got bumped and logged out when we were messing with cables to get the TV screens back
    • Logged back to redhat as cdaq user and restored vnc and scripts with no problem.

Current Run Plan

• Continue with Setting 2.
  • Are there any changes that need to happen to the run plan due to beam being down all night?

Notices in Effect for Shift Crew

• Continue to fill out SHMS Excel Spreadsheet.

Current Issues

• Hall C in restricted access due to PSS Error.
• MCC investigating as to why the Energy Measurement failed so badly.
  • Email from Jay Benesch: "Beam should be about 2 mm sigma in the horizontal due to peak

dispersion. Beam line 22 mm ID, centroid horizontal offset only 1 mm so ten sigma should have sufficed."

• • Mentioned in meeting that they have changed the procedure to have 2uA tune beam when during certain parts of the measurement when possible (instead of 10uA).
    • (Said quite a few things that I didn't understand about some technical things).
  • We should continue to follow up with them to get the mystery solved before the next beam energy measurement.
• What do we need to do for Monday?
  • Warm up target.
  • Power Down the magnets
  • Turn off HVs
    • Leave any on?
• What do we need to do before we come back in January? (Is this meeting the place to take about it?)
  • Unser issues.
  • HDMI cables and adapters for the TVs that keep disconnecting.