Run Group M

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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+[ten digit number]

Role Phone Number
Hall B Run Coordinator (757) 575-7540 (cell)
Hall B Physics Division Liaison (757) 876-1789 (cell)
MCC 7048
Crew Chief 7045
Crew Chief (757) 876-3367 (cell)
Program Deputy (757) 876-7997 (cell)
RadCon (757) 876-1743 (cell)
Gate House Guard 5822
Location Phone Number
Hall B Floor 5165
Hall B Space Frame 5170 and 5171
Hall B Forward Carriage 5371
Hall B Gas Shed 7115
Hall B Counting House 5244 (Shift Expert)
Hall B Counting House (757) 329-4846 (Shift Expert cell)
Hall B Counting House 5245 or 5126 (Shift Worker)
Hall A Counting House 5501
Hall C Counting House 6000
Hall D Counting House 5504
Hall B System Phone Number On-Call Person
Engineering (757) 748-5048 (cell) Engineering On-Call (primary)
Engineering (757) 897-9060 (cell) Denny Insley (secondary)
Slow Controls (757) 748-6922 (cell) Nathan Baltzell
Beamline (757) 303-3996 (cell) Eugene Pasyuk
DC (757) 748-5048 (cell) Engineering On-Call
(primary and/or secondary)
SVT/MVT/MM (757) 541-7539 (cell)
(757) 753-7769 (cell)
Yuri Gotra (primary)
Rafo Paremuzyan (secondary)
ECAL (757) 810-1489 (cell) Cole Smith
FTOF/CTOF (757) 344-7204 (cell) Jose Carvajal
CND (757) 329-4844 (cell) Pierre Chatagnon
HTCC/LTCC (757) 344-7174 (cell) Youri Sharabian
FT (757) 344-1848 (cell) Raffaella De Vita
BAND (757) 310-7198 (cell) Florian Hauenstein
RICH (757) 344-3235 (cell)
(757) 748-6922 (cell)
Valery Kubarovsky (primary)
Nathan Baltzell (secondary)
DAQ (757) 232-6221 (cell) Sergey Boiarinov
Target (757) 218-2266 (cell) Xiangdong Wei
Authorized Hall B Solenoid/Torus Operators
Hall B Denny Insley, Morgan Cook, Eugene Pasyuk
Magnet Group Probir Ghosha, Renuka Rajput-Ghoshal
Detector Support Group Brian Eng, Pablo Campero, Tyler Lemon
DC Power Onish Kumar, Sarin Philip
  • Note, all non-JLab numbers must be dialed with an area code. When calling from a counting-house landline, dial "9" first.
  • To call JLab phones from outside the lab, all 4-digit numbers must be preceded by 757-269
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Click Here to edit Phone Numbers. Note, you then also have to edit the current page to force a refresh.

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: Justin Estee

PDL: Valery Kubarovsky

Run Plan: Jan 13 - Jan 14 2022

Production runs use PROD67_noVTPread and the trigger rgm_2GeV_out_v1_0.trg .
Run duration should be no more than 100M events or 4 hours, whichever comes first.


  • Switch to LD2 target 8AM Jan 13
  • Check beam position values are nominally within what is on the white board.
  • Luminosity scan (1,2,3,4 nA)(Call RC for production current)
  • Continue to take 100M events or 4-hr runs with ever comes first with rgm_2GeV_out_v1_0.trg use configuration file PROD67_noVTPread for one run.

DAQ configuration

PROD67_noVTPread , production trigger rgm_2GeV_out_v1_0.trg

At the end of each run, follow the STANDARD DAQ RESTART SEQUENCE

  • "end run", if the run ended correctly then: "prestart", "go"

  • if the run did not end correctly or if any ROCs had to be rebooted:
  • "cancel", "reset"
    • "configure", "download", "prestart", "go"
  • After each step, make sure it is completed in the Run Control message window. If a ROC has crashed, find which one it is, issue a roc_reboot command ON JUST THAT ROC and try again. Contact the DAQ expert if there are any questions.


  • If any weird stripes appear in the DC occupancy plots, call Sergey. This is a known problem.
  • 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 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:
    1. Notify MCC to request beam OFF and to drop Hall B status to Power Permit
    2. Call Engineering on-call
    3. Make a separate log entry with copies to HBTORUS and HBSOLENOID logbooks. In the "Notify" field add Probir Goshal, Dave Kashy, and
    4. Notify Run Coordinator
    5. Turn off all detectors
  • Note 5: When the beam is being delivered to the Faraday Cup:
    1. the Fast Shut Down elements: Upstream, Midstream, Downstream, BOM, and Solenoid should always be in the state UNMASKED
    2. 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: ECAL HV SEC2_WI_E36 is known to be problematic. Channel stays off for now.
  • Note 10: LTCC is NOT used in this experiment. HV should be kept OFF.

  • Note 11: If responding to RICH or Trigger alarms please post screens also to RICH or HBTRIGGER logbook, respectively.
  • Note 12: Do a RICH recovery (press the RICH Recovery button on the GUI) once daily during the day shift between runs.
  • Note 13: Cycle the FMT Gas once per shift. If done rapidly without pausing (Gas "stop"-"yes"-"start"-"yes"), the HV should not crash.

References and Standards:

(last update 12/14/2021- 22:10)

Nominal Beam Positions

  • 2H01, X: -0.6 mm, Y: -0.2 mm
  • 2C24, X: -2.0 mm, Y: +0.6 mm

FSD Thresholds

  • Upstream: 2000 Hz
  • Midstream: 2000 Hz
  • Downstream: 500000 Hz
  • BOM: 10000
  • 5 ms dwell time

Reference Harp Scans for Beam on Faraday Cup: 2H01 [1]

Reference Harp Scans for Beam on Tagger dump: 2C21 [2], tagger harp [3]

Reference Monitoring Histograms (80 nA, production Ca-48) [4] Old reference Monitoring Histograms (50 nA, production LD2) [5]

Counter rates

  • Upstream counters integrated rates: 0-15 Hz (acceptable up to 100 Hz are acceptable) @50 nA.
  • Midstream counters: 10-20 Hz (acceptable up to 50 Hz) @50 nA.
  • Counting rates of ~ hundreds of Hz may indicate bad beam tune or bleed-through from other Halls.

Beamline vacuum: should be not higher than 5e-5.

General Instructions:

  • The main lights in the Hall (dome lights) and the Forward Carriage lights are being kept off because of light leaks affecting some of the detectors. If these lights are switched on during access, they should be switched off when leaving the Hall. Refer to these photos!
  • ON: [6]
  • OFF: [7]

Note that the dome lights when switched off cannot be turned back on immediately because they require 10-15 min to cool down.

  • Do not run more than 30 minutes with >150 W beam to Faraday cup without the beam blocker.
  • 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
  • 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.

Every Shift:

  • Follow the run plan as outlined by RC
  • If any concern about beam stability, ask MCC if orbit locks are on (they should be).
  • Keep shift summary up to date in HBLOG. Record all that happens.
  • Document any beam condition change and send scaler GUIs to HBLOG
  • Fill and submit the shift checklist in the logbook
  • Cycle the FMT gas once per shift in-between runs! Turning off and on the gas flow without pausing to avoid HV trips. If the HV tripped, make sure that once gas flow is restarted and the flow differential is down to reasonable values, to turn the FMT HV back on and let it ramp all the way up. Remember that this experiment is only using 3 FMT layers, not 6.

Every Run:

Log screenshots of: (this is for the remote shifter, see dedicated Remote Shifts tab above.)

  • Main beamline GUI overview
  • clas12mon detector monitoring plots
  • Trigger rate GUI

In case of other questions or uncertainties of what to do, call the RC or PDL



Hall Webcams

Epics on the web

Live Monitoring Links

RGM monitoring dec 21 charge.png



Backup shifter contact info
Name Email Cell phone
Justin Estee
Andrew Denniston
Sara Ratliff
Erin Seroka