Run Group A
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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: Daniel S. Carman
- (757) 575-7540
- 9 575 7540 from Counting Room
- carman@jlab.org
PDL: Eugene Pasyuk
- (757) 876-1789
- 9 876-1789 from Counting Room
- pasyuk@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 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=1.0 mm, Y=-1.0 mm) see log entry https://logbooks.jlab.org/entry/3570290.
- Note 4: Do not turn OFF FTOF HVs, even during the beam tune
- Note 5: 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 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
- Notify Run Coordinator
- Call the MM expert to turn the detector off
- Call SVT expert to turn SVT off
- Turn off all the other detectors
- Note 6: When 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 7: Do not turn on or off 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.
Start-up Run Plan:(Updated: Aug. 24, 2018 at 12:21 p.m.) 1) Before the start of beam delivery: Ramp torus field to -100% (negatives inbending) and ramp solenoid field to -100%. (Call PDL for this step)
2) Complete beam tuning studies - This effort will be carried out under the direction of the beamline expert
3) With empty target:
If target is functional: 4a) Fill the target (call Bob Miller for this step; number on whiteboard) 5a) Turn beam back on at 5 nA - ensure FSD settings are proper 6a) Perform current scan
7a) Check DAQ rates and performance (including initial studies of FADC bit packing) 8a). Complete MM setting optimization. This work will be completed under the direction of the MM experts. 9a). Check DC settings and make sure they are optimized. This work will be completed under the direction of the DC expert. 10a) Perform trigger test plans (trigger checks and optimization, study of DC tracking trigger, FTOF/PCAL matching). This work will be completed under the direction of the trigger experts 11a) Optimize the FT settings (FT group will take over DAQ control remotely and complete task). This should be done (preferably) during the owl shift. 12a) Complete a luminosity scan and record data in the following sequence with the standard RG-A trigger:
13a) Take data with the standard RG-A trigger at 20 nA for 4 hrs to collect data for baseline subsystem calibrations 13a) Take production data with the standard RG-A trigger at 40 nA (3 hr runs) If target is not functional: 4b) Ramp torus to 0% field (call Engineering for this step) 5b) Take data at 2 nA for DC alignment studies for 1 hr 6b) Have MCC turn the beam off 7b) Ramp solenoid to 0% field (call Engineering for this step) 8b) Take data at 2 nA with both magnets for DC and CVT alignment studies off for 8 hrs Shift Worker Notes:
In case of other questions or uncertainties of what to do, call the RC |
General Instructions:
Every Shift:
Every Run: Log screenshots of:
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