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/CND (757) 344-7204 (cell) Daniel Carman
ALERT (757) 329-4844 (cell) Raphael Dupré
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)		 Christopher Dilks (primary)
Nathan Baltzell (secondary)
DAQ (757) 232-6221 (cell) Sergey Boiarinov
HYDRA (317) 550-9226 (cell) Torri Jeske
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, Spring 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 (clas12run@gmail.com can fill the run list)

RC: Lei Guo

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 UPSTREAM counters has to be in the range 0-15 Hz (rates up 100 Hz are acceptable) and MIDSTREAM has to be in the rage 10-20 Hz (acceptable up to 50 Hz) @50 nA. Count rates in the range of hundreds or more may indicate bad beam tune or bleed-through from other Halls.

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

"end run", "cancel", "reset", then

if run ended correctly "download", "prestart", "iocjscalerRestartAll.sh", "go".

if run did not ended correctly, or ROCs had to be rebooted "Configure", "download", "prestart", "iocjscalerRestartAll.sh", "go".

After DAQ prestart is complete reboot the scaler IOCs with the command: iocjscalerRestartAll.sh.

Note: 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 4: Do not turn OFF FTOF HVs, even during the beam tune
  • Note 5: In case of the Torus and/or Solenoid Fast Dump do the following -
    1. Notify MCC, request beam OFF and drop Hall status to Power Permit
    2. Call Engineering on-call
    3. Make separate log entry with copies to HBTORUS and HBSOLENOID logbooks. In the "Notify" filed add Ruben Fair, Probir Goshal, Dave Kashy and esr-users@jlab.org
    4. Notify Run Coordinator
    5. Call the MM expert to turn the detector off
    6. Call SVT expert to turn SVT off
    7. Turn off all the other detectors
  • Note 6: When beam is being delivered to the Faraday Cup -
    1. the Fast Shut Down: Upstream, Midstream, Downstream, BOM and Solenoid should be always Unmasked,
    2. No changes to the FSD threshold without RC or beamline expert approval.
  • Note 7: Do not turn on or off SVT - only SVT expert can do that
  • Note 8: Any request for a special run or change of configuration has to be approved by RC & documented.
  • Note 9: Check carefully BTA every hour and run script btaGet.py . It will 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.

Run Plan: May3-May 6

May 3(Swing) - May 6 (Owl)


Torus Magnet is being ramped back up. Tagger is already ramped up to 462.7A. Check with MCC when beam might be ready and log it in the shift summary. When they are ready, put "blank" collimator in and then request 5nA CW beam first to be sent to tagger yoke. Perform hapr scan on 2c21A and tagger Verify that the FTC asymmetry is low, and the beam positions are good. Perform 2H01 Harp scan on both 2C21A and tagger, and verify the beam (widths) are good by following the beam-establishment procedure. If the results are satifactory, log the results, and request tagger magent degaussing. When that is done, move "20mm collimator" in and make sure all detectors are off except FTOF and FTC. Take beam blocker out and request 5nA CW beam to Faraday cup. Remind MCC our desired beam positions ("Note 3" above). Then increase the beam current to 50nA. Perform 2H01 harp scan. If results are acceptable, and FTC asymmetry are low (<1%) log it.

If good beam is established, rest FSD thresholds to previous values (1000, 1000, 850000, 5000, for up, mid, dowstream and BOM) and change the drell time to 5ms. Call Yuri to turn SVT back on. Shift workers should then turn all other detectors back on. Put beam blocker in. Resume production data taking afterwards.

If the above failed, follow the procedure for reestablishing the beam and notify RC and beamline expert.


May 4 (Owl) -- May 6th (Owl)

Continue produciton data taking. During owl shift, Genova group (Raffaella/Andrea) might call in and perform FT-trigger-only data for calibration purpose. Please work with them. This should take about 2hours. Continue production data afterwards

During Day shift, a series of special runs will be taken. Take produciton data til 9am (or whenver 100M events are reached for the on-going run), then call Sergey for teh special runs, which includes the DAQ tests, and then random trigger runs. There might also be need for Drift chamber varying read-out window sizes runs at low intensity (2-5nA) that might be needed. Detailed plan will be updated druing noon time.

After all special runs are over, continue produciton data taking until May 6 5am (Owl).

May 6 7am.

A small reception full of fancy food will be held in the counting house at 7am for the early birds. No reservation needed. Dress code: photo-friendly.

  • From time to time, we might experience trigger bit issues (FT bits: 24, 25, and 26 and 27). bit 26 might not trigger the alarm but when this issue happens it will count abnormally high pre-prescale. For the time being, shift leaders cand try to do the sequence of End->Cance->Reset, ro_reboot adcft1 (and adcft2, adcft3), make sure the roc 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 persist, please continue 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 50 nA and continue data for production. If there are issues with the beam call the RC. Sometimes MCC operator might ask to deliver tune beam --- please do not accept it. We need CW beam sent to the Faraday cup. If there is in deed a need for tune beam, it should be sent to the tagger dump with the tagger magent on. If you are uncertain, please call RC/PDL.


  • Please contact the Micromegas (BMT, FMT & FTT) expert if there are trips, or if you notice any issues in the online monitoring. Do not turn OFF or ON the MM only the expert can do that. See Log entry https://logbooks.jlab.org/entry/3556528

Sometimes, a couple of RICH channel scalers would go to 0 and there is no alarm, even though the "# of fjibers 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, please refer to the instruction below.

  • 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, please contact the RICH expert on call



In case of other questions or uncertainties of what to do, please 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 unecessary 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 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:

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


Clas12design.png

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