RC Meeting, Tuesday, November 3 , 2021

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RC Meeting Information

RC Daily Meetings are at 10 am, remote connection link: https://bluejeans.com/861439920 There is a 10:00 RC meeting today, 11/03/2021!

Accelerator Status

  1. Beam delivery to Halls B,C,D
  2. Beam off for maintenance around 06:00

Hall C Status

Maintenance day. Hall is in Restricted access, to facilitate the pre-positioning of the aerogel tray in view of the energy change.

  1. Good running over the last 24 hours. Dummy run on 11/02/2021 day shift.

Number of good pions is 9596 (check?).

Current Run Plan

  1. Accelerator might be able to come back early, so we should plan on closing the hall by 16:00 on Friday.
  1. Switch to new kinematics (values?...)

Current Issues

  1. Maintenance day 11/03/2021, retuning: 11/05-11/07/2021
  2. Replace flow switches for (HMS?) magnet power supplies: next opportunistic access (Joe Beaufait) ( PENDING )
  3. HMS Q3 insulating vacuum spikes generating annoyance alarms that take minutes to recover. https://logbooks.jlab.org/entry/3930175 Noise levels on transducers look OK, but Junaid's plot indicates Q3 is burping: https://logbooks.jlab.org/entry/3932992 .
  4. Serious HB LHe low liquid level alarms. https://logbooks.jlab.org/entry/3933051 Always seems to start with a subtle, simultaneous increase in level in Q1/2/3. https://logbooks.jlab.org/entry/3929152 .
  5. Target ladder camera was identified to be bad: Joe Beaufait will order camera ( PENDING )
  6. Still running with no UPS on the SHMS cryo controls - Steve L. has ordered batteries and UPS. ( PENDING )
  7. HCCAM02 not functioning (lift required to replace).

Special Requests

Useful Links