RC meeting and Run Plan, Wednesday April 19th

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RC Meeting Information

RC: Jimmy Caylor

Useful Links

• MCC White Board
• Hall A Electronic Logbook
• Ops elog
• Experiment run plans
• Shift Schedule

Current Status

On the accelerator side:

--> Beam delivery is good when we take it

--> Asked

On the Hall side:

--> Completed detector checkout

--> Took Hall-GEM alignment data overnight

--> LH2/D2 elastics data until morning

--> Hall sweep was completed just before 9 am

--> Techs quickly inserted the steel analyzer

--> Alex checked on DAQ and Jiwan on coin trigger window

--> Currently GEMs are turned off with issue with gas mixture. Need to wait for new mixture to stabilize until turning GEMs on with beam. Multi-hour process

Current Run Plan

• What to do with no GEMs for at least a few hours

--> BCM calibration?

GEN-RP KLL run plans

Notices in Effect for Shift Crew

• For controlled access call the RC and together you will fill out the Hall access checklist. [1]

• Please pay attention to BTM, incorrect accounting is happening. also make sure to submit all hours, including the last one.

• Please fill out the shift checklist and notify RC if there are any issues

Current Issues

• GEM gas mixture needed changing

Planned Accesses to the Hall

• Shielding Bricks - opportunistic

Sub-systems

• SBS and BB magnets
• BB GEMs
• BB Grinch - https://logbooks.jlab.org/entry/4282816
• BB Cal - Happy with 1.2 GeV threshold for production?
• BB scin - https://logbooks.jlab.org/entry/4282910
• SBS GEMs - Changing GEM gas, could be responsible for dead sectors? https://logbooks.jlab.org/entry/4283427
• SBS analyzer + RP hodo
• SBS HCAL - Coin window delay added and window changed
• DAQ
• Analysis
• Target - Sometimes does not want to move right to LH2, need to stop at carbon hole and then go
• Beam line
• Moller
• Raster