Run Group M
Shift ScheduleESAD, COO, RSAD Read before shift!!!Shift ChecklistHot CheckoutBeam Time Accounting
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CLAS12 Run Group M, Fall 2021
Beam energies: 2.1, 4.0, 6.0 GeV (1.96 GeV/pass)
Important: Document all your work in the logbook!
RC: Axel Schmidt
- (757) 575-7540
- 9 575 7540 from Counting Room
- axelschmidt@gwu.edu
PDL: Valery Kubarovsky
- (757) 876-1789
- 9 876-1789 from Counting Room
- vpk@jlab.org
- Note 1: Be very mindful of the background rates in the halo counters, rates in the detectors, and currents in the SVT for all settings to ensure that they are at safe levels.
The integrated rates on the upstream counters have to be in the range 0-15 Hz (rates up to 100 Hz are acceptable) and the rates on the midstream counters have to be in the range 10-20 Hz (acceptable up to 50 Hz) @50 nA. Counting rates in the range of hundreds of Hz may indicate a bad beam tune or bleed-through from other Halls.
- Note 2: Nominal beam positions: 2C24A (X=-2.0 mm, Y=0.6 mm) , 2H01 (X=-1.1 mm, Y=1.3 mm)
- Note 3: Do not turn OFF FTOF HVs, even during the beam tune with CW beam (turn off if tuned/pulsed beam in the upstream beamline)
- Note 4: In case of a Torus and/or Solenoid Fast Dump do the following:
- Notify MCC to request beam OFF and to drop Hall B status to Power Permit
- Call Engineering on-call
- Make a separate log entry with copies to HBTORUS and HBSOLENOID logbooks. In the "Notify" field add Probir Goshal, Dave Kashy, and esr-users@jlab.org
- Notify Run Coordinator
- Turn off all detectors
- Note 5: When the beam is being delivered to the Faraday Cup:
- the Fast Shut Down elements: Upstream, Midstream, Downstream, BOM, and Solenoid should always be in the state UNMASKED
- No changes to the FSD threshold should be made without RC or beamline expert approval
- Note 6: Any request for a special run or change of configuration has to be approved by the RC & documented
- Note 7: * Fill out BTA hourly. Click "Load from EPICS" to automatically fill the left side then correct as needed.
- Note 8: Reset CLAS12MON frequently to avoid histogram saturation.
- Note 9: If crate ADCBAND was rebooted: Contact BAND expert and make a note in the HBBAND logbook and in HBLOG.
- Note 10: ECAL HV SEC2_WI_E36 is known to be problematic. Channel stays off for now.
- Note 11: LTCC is NOT used in this experiment. HV should be kept OFF.
- Note 12: If responding to RICH or Trigger alarms please post screens also to RICH or HBTRIGGER logbook, respectively.
Run Plan: Dec 3 - Dec 5 2021Continue production at 90 nA on Carbon. More to follow soon. Run Plan: Nov 30 - Dec 1 2021PROD66 and the trigger rgm_6GeV_inb_v1_0.trg, 100 M events (max 4 hours) per run.
Dec. 1st.
Hall Access Items (xxx):Dan Carman needs ~30 mins to replace components on CTOF Sergey need ~15 mins to replace FTOF cables DAQ configurationPROD66 , production trigger rgm_6GeV_inb_v1_0.trg
Shift Worker Notes:In case of other questions or uncertainties of what to do, call the RC or PDL Every Run: Log screenshots of (this is for the remote shifter see dedicated Remote Shifts tab above.)
References and Standards:(last update 1/14/2020- 23:20) Nominal Beam Positions
FSD Thresholds
Reference Harp Scans for Beam on Faraday Cup: 2C24 (tagger harp) [1], 2H01 [2] Reference Harp Scans for Beam on Tagger dump: 2C21 [3], 2C24 (tagger harp) [4] Reference Monitoring Histograms (90 nA, production C(4x) trigger) [5] [6] Counter rates
Beamline vacuum: should be not higher than 5e-5.
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General Instructions:
Every Shift:
Every Run: Log screenshots of: (this is for the remote shifter, see dedicated Remote Shifts tab above.)
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