Run Group A

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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]

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)
(757) 897-9060 (cell)		 Engineering On-Call (primary)
Denny Insley (secondary)
Slow Controls (757) 748-6922 (cell) Nathan Baltzell
Beamline (757) 303-3996 (cell) Eugene Pasyuk
DC (757) 218-4372 (cell)
(757) 748-5048 (cell)		 Florian Hauenstein (primary)
Engineering On-Call (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) Daniel Carman
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
Cryotarget (757) 218-2266 (cell)
(757) 871-5374 (cell)
(757) 897-1415 (cell)
(757) 746-9277 (cell)		 Xiangdong Wei (first)
James Brock (second)
James Maxwell (third)
Chris Keith (fourth)
RG-E Solid Target (757) 344-1848 (cell) Antonio Radic
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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CLAS12 Run Group A, Fall 2018
Beam energy 10.6 GeV (5 pass)
Important: Document all your work in the logbook!
Remember to fill in the run list at the beginning and end of each run

RC: Rafayel Paremuzyan

PDL: Eugene Pasyuk


  • 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.

  • Note 2: At the end of each run, follow the standard DAQ restart sequence

"end run", "cancel", "reset", then if the run ended correctly, "download", "prestart", "iocjscalerRestartAll.sh", "go". If the run did not end correctly or if any ROCs had to be rebooted, "configure", "download", "prestart", "iocjscalerRestartAll.sh", "go".

After each step, make sure it is complete in the Run Control message window. If a ROC has crashed, find which one it is and issue a roc_reboot command and try again. Contact the DAQ expert if there are any questions.

  • Note 3: Nominal beam positions: 2C24A (X=0.5 mm, Y=0.5 mm) , 2H01 (X=.6 mm, Y=.2 mm)
  • Note 4: 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 5: 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 separate log entry with copies to HBTORUS and HBSOLENOID logbooks. In the "Notify" field add Ruben Fair, Probir Goshal, Dave Kashy and esr-users@jlab.org
    4. Notify Run Coordinator
    5. Turn off all detectors
  • Note 6: When 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 7: Do not turn on the SVT or MM - only the SVT or MM expert can do that
  • Note 8: Any request for a special run or change of configuration has to be approved by the RC & documented
  • Note 9: Carefully check the BTA every hour and run the script btaGet.py to print for you what HAS TO BE in BTA for this hour. Edit BTA if it is incorrect.
  • Note 10: Reset CLAS12MON frequently to avoid histogram saturation.
  • Note 12 Do not Turn OFF MVT HV: Instead go to 'Restore settings' from the MVT overview screen:
    1. SafeMode.snp
    2. MV_HV_FullField.snp for full solenoid field
    3. MV_HV_MidField.snp wgeb solenoid < 4T

Run Plan:

(Updated: Oct. 5 2018 at 14:31)

  • Make sure that the FSD thresholds are set correctly and they are unmask when ready to receive beam to the FC
  • Complete the last step of the Moeller run, which is HWP-IN,
  • When Moeller runs are finished, we should go to FCup and Mike Tiefenback will work on shrinking our beam spot a the target
    • Ask MCC to deGauss the tagger magnet
    • Remove the Moeller target
    • Put the collimator to the 20mm position
    • Ask MCC to unmask all our FSDs, make sure the integration time is 5 ms, and limits are following
      • Upstream: 1000
      • Midstream: 1000
      • BOM : 8000
      • Downstream: 180000
    • Make sure HV on all detectors is off
    • Ask for 10 nA beam, Make sure you can see a good beam spot on the beam viewer, UPstream halo rate is less than 50 Hz, Midstream is less than 50 Hz,if these conditions are satisfied then we have a clean beam transport through the beamline, and now Mike can work on the beam profile.
    • Ask MCC to put integration time on Midstream, BOM and Downstream FSDs to 50 ms, and following FSD thresholds:
      • BOM: 50000
      • Midstream 20000
      • Downstream 250000
      • upstream 1000
  • Call Mike 7878 or 7430 and ask for his instructions
  • When Mike finishes the beam tuning
    • Ask MCC to change integration times back to 5ms
    • ask for following limits:
      • BOM: 50000
      • Midstream 1000
      • Downstream 850000
      • upstream 1000
    • Turn on HV on detectors by reading notes 6, 7, and 12 mentioned above this page.
    • go to production current 45nA and take data with the trigger_v20_3.
  • The plan is to take production data for the whole weekend with this settings.
  • Any questions call system expert, RC or PDL.




Shift Worker Notes:

  • From time to time, we might experience trigger bit issues (FT bits: 24, 25, 26, 27). Bit 26 might not trigger the alarm but when this issue happens it will count abnormally high. For the time being, shift leaders can try to do the sequence of End->Cancel->Reset, roc_reboot adcft1 (and adcft2, adcft3), make sure the ROCs are connected, then Download->Prestart->Go. If this does not work, repeat the sequence and add "Configure" in front of "Download". If the trig issue persists, continue to take production data without fixing it -- please make sure you log this infor in the RCDB "Comment" field.
  • If the machine is down for few hours ask for low current first 5 nA make sure that the beam is stable both in position and current, check that the rates are OK on all the detectors and halo counters. Then ask for 40 nA and continue data for production. If there are issues with the beam call the RC. Sometimes MCC operator might ask to deliver tuned beam --- do not accept it. We need CW beam sent to the Faraday cup. If there is indeed a need for tuned beam, it should be sent to the tagger dump with the tagger magnet on. If you are uncertain, please call RC/PDL.
  • Sometimes, a couple RICH channel scalers go to 0 and there is no alarm, even though the "# of fibers connected" would be shown to be the correct 138. Shift takers therefore should periodically, especially at the end of run, check the RICH scalers GUI. If there is an issue:
    • For RICH recovery procedures, please see Log entry https://logbooks.jlab.org/entry/3562273. This would apply in the cases of 1. DAQ crash: rich4 is not responding or 2. RICH alarms (LV,missing tile, temperature etc). If it does not work or you are uncertain about what to do, contact the RICH expert on call.

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

General Instructions:

  • For a given beam current, compute the FSD thresholds according to the Establish Physics Quality Beam document. Call MCC to update the values. Contact the beamline expert if there are questions about setting the FSD thresholds.
  • 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 an access, they should be switched off when leaving the Hall. Note that the dome lights when switched off cannot be turned back on immediately because they require 10-15 min to cooldown.
  • Do not run more than 60 minutes above 30 nA with 5-pass beam without the beam blocker in front of Faraday cup. Put beam blocker in for long running at high currents for 5 pass operations.
  • Turn DC HV off only for beam tuning; if no beam is available or when 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
  • With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem.
  • All jscaler iocs (iocjscalerX) on the health screen (under DAQ tab) must be restarted after every DAQ prestart is completed. Follow this link for detailed instructions https://userweb.jlab.org/~baltzell/CLAS12/SC/jlabScalersOps.txt
  • 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: 2C21, 2C24, 2H01

Every Shift:

  • Follow 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.
  • Check on white board all scalers, strip charts and monitoring plots that need to be logged regularly
  • Document any beam condition change and send scaler GUIs to HBLOG
  • Fill out BTA hourly. Click "Load from EPICS" to automatically fill the left side.
  • Fill and submit the shift checklist in the logbook

Every Run:

Log screenshots of the following screens, and make sure at the moment you capture the screen the beam is ON

  • main scaler GUI display
  • Detector occupancy plots
  • Trigger rate gui
  • Beam strip charts
  • FTCalo FADC scalers


Clas12design.png

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