RC meeting and Run Plan, Sunday, May 11th

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RC Meeting Information

Current RC: Asar Ahmed

RC Daily Meetings on Mondays and Wednesday are at 1:00PM, and Tuesdays, Thursdays, and Fridays at 1:30PM, via Zoom and in person in the counting house meeting room (2nd floor).

Zoom info

Useful Links

• Shift Schedule
• Hall A Logbook
• MCC White Board
• Hall A Safety Docs
• Run Coordinator Wiki

Accelerator

• Still struggling to transport the beam to the halls (https://ace.jlab.org/dtm/open-events?event_id=20337 ).
• No estimated recovery time.

Status of Hall

• Required to follow the beam recovery procedure when we have a beam.

Updates on Subsystems

• ECal:
  Calibration requred
• HCal:
  Calibration requred
• GEMS:
  FT L1: New Pedestals uploaded to vtps
• CDET:
  Calibration requred
• DAQ:
• Analysis Software

Access request Today

• None

Items to keep an eye

• Target chamber pressure (Lawrence is looking at a spare turbo pump, we might get one from Hall-B): Old
• SBS magnet current stability/overheating test: Plane dropped

Shifts

• TO and SL required (Shifts are filled for June 10)

Run plan when MCC sends beam back

• Follow beam restoration procedure to the Hall
• 2uA beam for ECal and HCal trigger and gain calibration
• Production: Needs a new update

 * 5uA beam for 8 hours
 * 10uA beam for 8 hours

• For higher current up to 50 uA, MCC needs to be notified a few days early

Beam Restoration Procedure

• Use new "cross target" (1x1 mm "+" shape) for beam restoration as described in https://sbs.jlab.org/wiki/index.php/HOW_TOs#Beam_Recovery_Procedure_for_GEp

Beam requirements

• start off at 5 pass beam
• intrinsic beam size (at target): 150–500 µm (how high can be acceptable??)
• raster size: 2 mm X 2 mm
• During kin#3 SBS magnet will be at 1762.23 Amp, the corrector magnets at -80A for all.
• production run @ 5-10 µA for now
• For later
  • production beam current : 50 µA