November 28, 2022

RC Meeting Information

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

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Useful Links

• Shift Signup (Read only)
  • Shift Signup

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

Current Status

• Smooth running since Wednesday swing shift - completed data taking with target ladder I.
• Beam is off and hall is in the restricted access for the target ladder change work.
• Target work is anticipated to be done around Wednesday swing shift

Run Plan

• HMS EMC effect data taking at 20 deg and SHMS SRC data taking at 8 deg with target ladder II.

Resolved Issues

• Beamline vacuum - https://logbooks.jlab.org/entry/4089716 https://logbooks.jlab.org/entry/4089883
• Unexpected drop to restricted access on Saturday morning. Took 4 hrs to come back to beam permit. https://logbooks.jlab.org/entry/4091594
  • Random type of failure - trying to resolve it with the manufacturer.
• 2L02 vacuum issues - https://logbooks.jlab.org/entry/4091621

Issues

• None if you could believe that. (Nevermind)
• HMS shield temperature unknown - https://logbooks.jlab.org/entry/4092473
• Runs not copied to MSS in 2+ days - https://logbooks.jlab.org/entry/4092462

Notes

• SHMS rotation to 8 deg: Rotating SHMS below 8 deg will trip the limit switch. Start with putting 8.1 or 8.2 deg on the rotation GUI to see the angle offset first then correct for it.
• HMS rotation to 20 deg: There is an increased chance that the rotation will get "stuck" and require expert intervention.
  • When rotating to 20 degrees from smaller HMS angle, it is ok to go directly to 20 degrees.
  • When rotating to 20 degrees from larger angle, first rotate to 19 degrees, and then to 20 degrees.

To do

Take more data!