RC Meeting, Tuesday, November 2 , 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, 11/02/2021!

Accelerator Status

  1. Beam delivery to Halls B,C,D

Hall C Status

Continue production at 42 muA.

  1. Good running over the last 24 hours. Dummy run on 11/01/2021 swing shift.

Number of good pions is 8400+ (needs update!).

Current Run Plan

  1. Maintenance day shifted to 11/03/2021. Acceleration retuning firmly scheduled for 11/05/2021-11/07/2021.
  2. Maintenance day update: beam will be off around 06:00.
  3. As we need to go to "Restricted Access" the survey will take a little longer. I was assured it will be completed by 10:00 am so people that need access to the Hall should plan for that time tomorrow morning.
  4. Accelerator swing shift on 11/03/2021 is listed as "Recovery".

  1. Continue data taking until early Nov

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

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