RC Meeting, Friday, November 5, 2021

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. Energy change started later this morning than planned around 8:30

Hall C Status

1. Will be in controlled access.
2. Heidi will replace a UPS unit on SHMS cryo.
3. Vladimir + techs will change SHMS aerogel material.
4. Amy will help change SHMS angle to 8 deg prior to Hall work.
5. Accelerator changing the energy.

Number of good pions is 10274

Current Run Plan

1. Accelerator will change energy and push 5-pass beam into Hall for BLM and RF trip tuning over the weekend.
2. After that, we can go to 3 pass and begin that physics

Current Issues

1. Replace flow switches for (HMS?) magnet power supplies: next opportunistic access (Joe Beaufait) ( PENDING )
2. 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 .
3. 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 .
4. Target ladder camera was identified to be bad: Joe Beaufait will order camera ( PENDING )
5. Still running with no UPS on the SHMS cryo controls - Steve L. has ordered batteries and UPS. ( PENDING )
6. HCCAM02 not functioning (lift required to replace-Brad is tracking this replacement).

Useful Links

• How the harp scans and carbon hole target should look (see links):
• carbon hole target beam centering procedure:
• Resetting the "ioc heartbeat epics communications" (start by clicking on the heart at upper left of the magnet controls screen
• Fall 2021 Shift Schedule
• Hall-C Live Status
• Hall-C Logbook
• MCC White Board