RC Meeting, Tuesday, October 26 , 2021
From HallCWiki
RC Meeting Information
RC Daily Meetings are at 10 am, remote connection link: https://bluejeans.com/861439920
Accelerator Status
- The accelerator is still recovering from the tour, the repair of magnet MYBBS04, and a storm that passed thru around midnite.
- No beam has been seen yet downstream of the repaired magnet, so no beam to Hall D yet.
- The pass changes for Halls A and B have taken place.
- As of 08:00, MCC was still tuning to reduce Hall C beam contributing to high halo rates in Hall B.
- I think we're going to see a little more beam, then they'll take it away to enter the accelerator to check magnet polarities and BPMs.
Hall C Status
- As of 08:00, since the beam was turned off yesterday for the tour, we had less than 15 minutes of 42 muA beam in Hall C.
- Number of good pions was 5139 as of 08:00 Monday. I'm giving you a stale number because there was only 1.5 hours of beam after that before the beam was turned off for the tour.
Current Run Plan
- Day shift only: Try to take 1 hour of Dummy target each day. (a 100% live hour)
- Tentatively scheduled: a BCM calibration on Wednesday mid-afternoon.
- Continue data taking until early Nov
Current Issues
- Replace flow switches for (HMS?) magnet power supplies: next opportunistic access (Joe Beaufait) ( PENDING )
- Q3 insulating vacuum spikes generating alarms. For example, https://logbooks.jlab.org/entry/3930175 .
- One HB LHe incident of note: https://logbooks.jlab.org/entry/3929152 . (possible clue to the origin?)
- Target ladder camera was identified to be bad: Joe Beaufait will order camera ( PENDING )
- Still running with no UPS on the SHMS cryo controls - Steve L. has ordered batteries and UPS. ( PENDING )
- HCCAM02 not functioning (lift required to replace).