Difference between revisions of "Run Group M"
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* '''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.''' | * '''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 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 bad beam tune or bleed-through from other Halls. | + | 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. |
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* ''' Note 2: At the end of each run, follow the standard DAQ restart sequence ''' | * ''' Note 2: At the end of each run, follow the standard DAQ restart sequence ''' | ||
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*# Notify MCC to request beam OFF and to drop Hall B status to Power Permit | *# Notify MCC to request beam OFF and to drop Hall B status to Power Permit | ||
*# Call Engineering on-call | *# Call Engineering on-call | ||
− | *# Make separate log entry with copies to HBTORUS and HBSOLENOID logbooks. In the "Notify" field add | + | *# 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 | *# Notify Run Coordinator | ||
*# Turn off all detectors''' | *# Turn off all detectors''' | ||
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* Establish physics quality beam for the production running at 3-pass, start from the tagger dump (see instructions [https://github.com/JeffersonLab/clas12-manuals/raw/master/beamline/manual/beam_estab.pdf]) | * Establish physics quality beam for the production running at 3-pass, start from the tagger dump (see instructions [https://github.com/JeffersonLab/clas12-manuals/raw/master/beamline/manual/beam_estab.pdf]) | ||
* After physics quality beam is established to the Faraday cup dump, proceed with the following: | * After physics quality beam is established to the Faraday cup dump, proceed with the following: | ||
− | ** Fill the target with LH, see instructions at [https://github.com/JeffersonLab/clas12-manuals/raw/master/target/Target_Shift_Worker_RGM_2021.pdf] | + | ** Fill the target with LH, see instructions at [https://github.com/JeffersonLab/clas12-manuals/raw/master/target/Target_Shift_Worker_RGM_2021.pdf] and turn ON CLAS12 detectors |
** Ask for 10 nA beam, check if rates in the detectors are reasonable | ** Ask for 10 nA beam, check if rates in the detectors are reasonable | ||
** Establish production current for LH2 target (limit 80 nA), run DAQ with the production trigger Configuration <b> PROD66 </b>, trigger <b> rgm_6GeV_inb_v1_0.trg </b> and increase beam current to 80 nA with steps of 5 nA. At every step record detector and DAQ rates (dump GUIs into logbook), run the monitoring and record DC R1 occupancy. Select the beam current when DC R1 occupancy are <5% and/or the DAQ LT is >95%(consult with RC). | ** Establish production current for LH2 target (limit 80 nA), run DAQ with the production trigger Configuration <b> PROD66 </b>, trigger <b> rgm_6GeV_inb_v1_0.trg </b> and increase beam current to 80 nA with steps of 5 nA. At every step record detector and DAQ rates (dump GUIs into logbook), run the monitoring and record DC R1 occupancy. Select the beam current when DC R1 occupancy are <5% and/or the DAQ LT is >95%(consult with RC). | ||
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'''In case of other questions or uncertainties of what to do, call the RC or PDL''' | '''In case of other questions or uncertainties of what to do, call the RC or PDL''' | ||
'''Every Run:''' | '''Every Run:''' | ||
− | Log screenshots of | + | Log screenshots of (this is for the remote shifter) |
* Main beamline GUI overview | * Main beamline GUI overview | ||
* clas12mon Detector occupancy plots | * clas12mon Detector occupancy plots | ||
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* Turn DC HV off only for beam tuning; if no beam is available or when the beam is stable, keep them on even if you are not taking data. | * Turn DC HV off only for beam tuning; if no beam is available or when the beam is stable, keep them on even if you are not taking data. | ||
* In case of loss of communication with IOCBTARG, follow instructions at https://logbooks.jlab.org/entry/3502218 | * In case of loss of communication with IOCBTARG, follow instructions at https://logbooks.jlab.org/entry/3502218 | ||
− | * Check that no unnecessary beamline-related screens are open. This includes particularly the big beamline overview screen, but also and any motor/harp/collimator screens, and | + | * Check that no unnecessary beamline-related screens are open. This includes particularly the big beamline overview screen, but also and any motor/harp/collimator screens, and IOC health screens. |
* Reference harp scans: [https://logbooks.jlab.org/entry/3571664 2C21], [https://logbooks.jlab.org/entry/3571676 2C24], [https://logbooks.jlab.org/entry/3571859 2H01] | * Reference harp scans: [https://logbooks.jlab.org/entry/3571664 2C21], [https://logbooks.jlab.org/entry/3571676 2C24], [https://logbooks.jlab.org/entry/3571859 2H01] | ||
<!-- * With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem. | <!-- * With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem. |
Revision as of 15:13, 10 November 2021
Shift ScheduleESAD, COO, RSAD Read before shift!!!Shift ChecklistHot CheckoutBeam Time Accounting
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Manuals |
Procedures |
JLab Logbooks
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If calling local numbers (with area code prefix 757) from the counting room dial 9+[last 7 digits]. To call other area codes dial 91+[10 digit number]
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- Note, all non-JLab numbers must be dialed with an area code. When calling from a counting-house landline, dial "9" first.
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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: Stepan Stepanyan
- (757) 575-7540
- 9 575 7540 from Counting Room
- stepanya@jlab.org
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=xx mm, Y=yy mm) , 2H01 (X=xx mm, Y=yy 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.
Run Plan: Nov 10 - 12 2021A 3-pass beam to Hall-B should be available some time during the day shift on November 10.
Hall Access Items (Wednesday, November 3rd):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)
References and Standards:(last update 1/14/2020- 23:20) Nominal Beam Positions
FSD Thresholds
Reference Harp Scans for Beam on Faraday Cup: 2C21 [3], 2C24 (tagger harp) [4], 2H01 [5] Reference Harp Scans for Beam on Tagger dump: 2C21 [6], 2C24 (tagger harp) [7] Reference Monitoring Histograms (40 nA, production trigger) [8] 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 tab above.)
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Overview
Tasks
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Shift Worker Backup Table
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Hall-B
Run lists |
Accelerator |
Bluejean meetings
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