Difference between revisions of "Run Group M"
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<b>Summary</b> | <b>Summary</b> | ||
− | * | + | * Tuesday day: install 2H target |
− | ** | + | ** follow procedures to restore beam |
− | * | + | ** do beam blocker calibration |
− | ** | + | ** take data at xx nA |
+ | * Thursday or Friday, switch to 4He target. | ||
+ | ** do beam blocker calibration | ||
+ | ** take data until end of run | ||
Revision as of 09:29, 14 December 2021
Shift ScheduleESAD, COO, RSAD Read before shift!!!Shift ChecklistHot CheckoutBeam Time Accounting
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Click Here to edit Phone Numbers. Note, you then also have to edit this 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: Larry Weinstein
- (757) 575-7540
- 9 575 7540 from Counting Room
- weinstei@jlab.org
PDL: Valery Kubarovsky
- (757) 876-1789
- 9 876-1789 from Counting Room
- vpk@jlab.org
Run Plan: Dec 10 - Dec 14 2021
PROD67_noVTPread and the trigger rgm_6GeV_inb_v1_0.trg, Run duration should be no more than 100M events or 4 hours, whichever comes first.
Summary
- Tuesday day: install 2H target
- follow procedures to restore beam
- do beam blocker calibration
- take data at xx nA
- Thursday or Friday, switch to 4He target.
- do beam blocker calibration
- take data until end of run
DAQ configurationPROD67_noVTPread , production trigger rgm_6GeV_inb_v1_0.trg At the end of each run, follow the STANDARD DAQ RESTART SEQUENCE
Announcements
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.
References and Standards:(last update 12/06/2021- 23:20) Nominal Beam Positions
FSD Thresholds
Reference Harp Scans for Beam on Faraday Cup: 2C24 (tagger harp) [1], 2H01 [2] Reference Harp Scans for Beam on Tagger dump: 2C21 [3], 2C24 (tagger harp) [4] Reference Monitoring Histograms (80 nA, production Ca-48) [5] Counter rates
Beamline vacuum: should be not higher than 5e-5.
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