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Run Coordinator: Hayk Hakoban (757) 575-7540

PDL: Nathan Baltzell (757) 876-1789, Office: x5902

Daily RC Meetings at 13:00 in CH Room 200C, and on ZOOM: URL Link (Meeting ID: 1611984219; Passcode: RGD-RC23), except on Wednesdays, which is on ZOOM ONLY @ 15:30.

Important Notes

• In case of medical or fire emergency, call 9-911 from a LANDLINE phone in the Counting House and inform the Crew Chief and RC.
• In case of evacuation of the Counting Room (e.g., due to a fire alarm), grab the shift expert phone and leave the room through the "EXIT" door leading to the parking lot. Do not leave through the hallway! Call the RC once outside so the latter will call MCC to turn the beam OFF to Hall B and inform other Hall B staff members.
• If you have symptoms or a positive COVID test, do NOT come to your shift - instead, inform the PDL and the RC and JLab medical services immediately to arrange replacements.

Friday, March 15 - Monday, March 18 Target: Yes Beam Blocker: OUT Trigger: rge-asdf.trg Configuration: PROD67 Special Test Runs: Cryocell Empty: 1. Double Target system alignment with all solid targets successively on beam position: app. 12 hrs 2. Trigger validation: with random trigger: app. 4 hrs 3. Trigger validation: no DC-roads electron trigger: app 1 hrs 4. PMT gain/HV calibrations for CND/CTOF/ECAL/FTOF with 75M events: app. 12 hrs 5. Zero field alignment run with empty cryotarget, 10M electron triggers with ~3nA current, just before/after a scheduled down time for torus/solenoid ramping: app. 4 hrs

References FSD Thresholds Do NOT change FSD settings without approval from RC or beamline expert! Upstream: 2 kHz Midstream: 2 kHz Downstream: 100 kHz BOM: 50 kHz 5 ms dwell time Harp Scans 2H01: x= -1.4 mm; y= 0.0 mm Tagger/2C24A: x= -2.0 mm; y= +0.6 mm 2C21A: x= -0.4 mm; y= +0.6 mm Charge Asymmetry HWP IN: 4194811 and 4195453 HWP OUT: 4195738 and 4195733

General Reminders The main lights in the Hall and the Forward Carriage lights must be kept off during data taking. - Refer to these reference photos, ON and OFF - The main, dome lights can be turned off without entering the Hall. Beamline - Do not run over XX minutes above YY nA with a 5-pass beam without the beam blocker IN. - If there is any concern about beam stability, ask MCC if orbit locks are on (they should be). - Document any beam condition change and send scaler GUIs to HBLOG. - If HWP is changed, start a new run. During beam tuning and Møller runs - DC: HV OFF - SVT: LV ON, HV OFF - MVT: LV ON, HV ON in SAFE Mode To access the Hall - If you need to enter Hall B, alert Denny Insley (757-897-9060, cell/text: 757-810-9576) and the Run Coordinator. - Check in with the shift personnel before entering the hall.

DAQ Operation Standard end and start of a run End run Abort Download Prestart "Go" Restart DAQ from scratch e.g., when changing configuration or trigger files, when the run did not end correctly, or after ROCs are rebooted Cancel Reset Configure Download Prestart Go