Difference between revisions of "Run Group A"
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* The machine will take the beam away for about 6 hours for RF recovery starting 9:00 am | * The machine will take the beam away for about 6 hours for RF recovery starting 9:00 am | ||
* '''Reverse TORUS polarity ( This will be done by the PDL)''' | * '''Reverse TORUS polarity ( This will be done by the PDL)''' | ||
− | * There will be some work to be done in the hall | + | * There will be some work to be done in the hall call MCC and ask for controlled access |
* Then prepare to receive beam to tagger yoke following the procedure outlined in section 1 in Establishing Physics-Quality Beam document at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. | * Then prepare to receive beam to tagger yoke following the procedure outlined in section 1 in Establishing Physics-Quality Beam document at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. | ||
* Once MCC ready to deliver beam call RC and follow the procedure outlined in section 1 in Establishing Physics-Quality Beam document at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf] to establish good quality beam to tagger-yoke dump. | * Once MCC ready to deliver beam call RC and follow the procedure outlined in section 1 in Establishing Physics-Quality Beam document at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf] to establish good quality beam to tagger-yoke dump. | ||
* Then proceed with beam tuning to the FC following the procedure outlined in section 2 in Establishing-Quality Beam document at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. | * Then proceed with beam tuning to the FC following the procedure outlined in section 2 in Establishing-Quality Beam document at [https://wiki.jlab.org/clas12-run/images/e/e3/Estab_beam.pdf]. | ||
− | * Once beam quality established to the FC we turn on all the detectors '''except SVT''' ask MCC for beam current of 5 nA making sure that experiment monitoring/rates of all detector are good, make sure that the beam is well | + | * Once beam quality established to the FC we turn on all the detectors '''except SVT''' ask MCC for beam current of 5 nA making sure that experiment monitoring/rates of all detector are good, make sure that the beam is well centered, then call SBT expert to turn on SVT> |
* Put beam blocker in | * Put beam blocker in | ||
* Ask MCC increase the current to 20 nA then to 30 nA | * Ask MCC increase the current to 20 nA then to 30 nA | ||
− | *Take production for 2hours @ 30nA with trigger file: trigger_v3.trg | + | * Take production runs for 2hours/run @ 30nA with trigger file: trigger_v3.trg |
* If the machine is down and it is back start with low current first (2nA and 5 nA) making sure that the beam is stable in current and position before moving to 30 nA | * If the machine is down and it is back start with low current first (2nA and 5 nA) making sure that the beam is stable in current and position before moving to 30 nA | ||
* In case of questions or uncertainties of what to do, please call the RC | * In case of questions or uncertainties of what to do, please call the RC |
Revision as of 12:20, 19 February 2018
[edit]
Shift ScheduleShift ChecklistHot CheckoutBeam Time Accounting
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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.
- To call JLab phones from outside the lab, all 4-digit numbers must be preceded by 757-269
- Click Here to edit Phone Numbers. Note, you then also have to edit the current page to force a refresh.
Click Here to edit Phone Numbers. Note, you then also have to edit this page to force a refresh.
CLAS12 Run Group A, Winter 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: Latifa Elouadrhiri
- (757) 575-7540
- 9 575 7540 from Counting Room
- latifa@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.
- Note 2: At the end of each run, follow the DAQ restart sequence "end run", "abort", "reset", "download", "prestart", "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 3: Nominal beam positions: 2H01 (X=1.0 mm, Y=-1.5 mm)
- Note 4: With beam to the Faraday Cup, typical rates on all halo counters upstream from the target should be either 0 or of the order of few counts. Count rates in the range of tens or more may indicate bad beam tune or bleed-through from other Halls.
Run Plan:(last update 2/18 - 10:30)
February 20 Day and Swing Shifts
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