RC Meeting, Thursday, October 28 , 2021
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RC Meeting Information
RC Daily Meetings are at 10 am, remote connection link: https://bluejeans.com/861439920
Accelerator Status
- Beam delivery back to Halls B,C,D on owl shift.
Hall C Status
Continue production at 42 muA.
- day shift: productive, 160 good pions recorded.
- swing shift: Empty target run #12863. A total (runs 12860-12864) of 111 good pions, including a grand total of one on the dummy target run.
- owl shift: very productive. 30 min lost to Acc. QE measurements.
Number of good pions is 5764+.
Current Run Plan
- BCM calibration: Thursday, @ 2:30 pm. As per the 8:00 am meeting this morning we should be OK to get up to the desired 60 muA so we can keep the errors on the fitted gains small.
- Continue data taking until early Nov
Current Issues
- Given the uncertainty associated with recent Hall A events it is not clear that the maintenance and retuning will happen as scheduled (Tu and Th, respectively). Need to follow this up with the scheduling committee.
- Replace flow switches for (HMS?) magnet power supplies: next opportunistic access (Joe Beaufait) ( PENDING )
- 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 .
- 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 .
- 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).
Special Requests
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