Difference between revisions of "RC Meeting, Sunday, October 24 , 2021"
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| − | # | + | # The accelerator still has an unresolved issue regarding A beam apparently going thru the C slit and causing BLM trips in Arc 7. |
| − | + | The problem was apparently avoided last nite by restricting Hall A to lower beam currents, but that won't last. | |
# Regarding the Arc 7 magnet short, probably the only thing that's going to happen on Monday is to inspect the magnet more and take measurements for construction of a drift pipe that will replace the magnet if it is going to be pulled out. So after we recover beam on Monday, expect continued delivery to A,B,C but no Hall D. | # Regarding the Arc 7 magnet short, probably the only thing that's going to happen on Monday is to inspect the magnet more and take measurements for construction of a drift pipe that will replace the magnet if it is going to be pulled out. So after we recover beam on Monday, expect continued delivery to A,B,C but no Hall D. | ||
| − | |||
# Pass change for Hall A is definitely Monday. | # Pass change for Hall A is definitely Monday. | ||
# The accelerator will be off 09:30 Monday morning to prepare for the Secretary of Energy tour. Tours wrap up at 13:30. | # The accelerator will be off 09:30 Monday morning to prepare for the Secretary of Energy tour. Tours wrap up at 13:30. | ||
Revision as of 10:50, 24 October 2021
RC Meeting Information
RC Daily Meetings are at 10 am, remote connection link: https://bluejeans.com/861439920
Accelerator Status
- The accelerator still has an unresolved issue regarding A beam apparently going thru the C slit and causing BLM trips in Arc 7.
The problem was apparently avoided last nite by restricting Hall A to lower beam currents, but that won't last.
- Regarding the Arc 7 magnet short, probably the only thing that's going to happen on Monday is to inspect the magnet more and take measurements for construction of a drift pipe that will replace the magnet if it is going to be pulled out. So after we recover beam on Monday, expect continued delivery to A,B,C but no Hall D.
- Pass change for Hall A is definitely Monday.
- The accelerator will be off 09:30 Monday morning to prepare for the Secretary of Energy tour. Tours wrap up at 13:30.
Hall C Status
- We've been back in good production at ~42muA since 6:15pm on Saturday.
- Number of good pions ...???
Current Run Plan
- 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).
