Difference between revisions of "Run Group M"
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− | * | + | * Follow the '''run plan''' as outlined by RC |
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* If any concern about beam stability, ask MCC if orbit locks are on (they should be). | * 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. | + | * Keep '''shift summary''' up to date in HBLOG. Record all that happens. |
* Document any beam condition change and send scaler GUIs to HBLOG | * Document any beam condition change and send scaler GUIs to HBLOG | ||
− | * | + | * '''Cycle the FMT gas once per shift''', in-between runs. If it is not reset, the interlock may drop and disable the HV. |
− | + | ** Turning off and on the gas flow without pausing to avoid HV trips. If the HV tripped, make sure that once gas flow is restarted and the flow differential is down to reasonable values, to turn the FMT HV back on and let it ramp all the way up. Remember that this experiment is only using 3 FMT layers, not 6. | |
− | + | * [https://bta.acc.jlab.org Fill out BTA] hourly. Click "Load from EPICS" to automatically fill the left side then correct as needed. | |
'''In case of other questions or uncertainties of what to do, call the RC or PDL''' | '''In case of other questions or uncertainties of what to do, call the RC or PDL''' |
Revision as of 23:08, 26 January 2022
- Shift Documentation
- Phone Numbers
- Short Term Schedule
- Notes/Known Issues
- Shift Expert
- Remote Worker Shift
- Monitoring
- Useful Links
Shift ScheduleESAD, COO, RSADShift ChecklistHot CheckoutBeam Time Accounting
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Manuals |
Procedures |
JLab Logbooks
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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+[ten digit number]
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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 the current 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: Susan Schadmand (phone below) and Sebastian Kuhn (kuhn@jlab.org, 757-639-6640)
- (757) 575-7540
- 9 575 7540 from Counting Room
- susansch@jlab.org
PDL: Valery Kubarovsky
- (757) 876-1789
- 9 876-1789 from Counting Room
- vpk@jlab.org
Run Plan: Jan 26 - Jan 30 2022
Production runs use PROD67_noVTPread and the trigger rgm_6GeV_inb_v1_0.trg .
Run duration 100M events or 4 hours, whichever comes first.
- Get Beam (pass2, 4 GeV beam)
- harp scans
- target centering
- if BEFORE 9pm:
- fill Ar target
- luminosity scan - increase downstream halo FSD threshold, if needed
- beam blocker calibration (during day)
- run for 2 days
- if AFTER 9pm:
- insert C target
- decide 80 or 90 nA
- beam blocker calibration
- run 12 hours
- switch to Ar (2 days)
- switch back to C
- Sunday switch to LH2
- take C data while purging ?
- 1 shift LH2
- beam blocker calibration
- 4 hours empty target
- Monday pass change (6GeV beam)
DAQ configuration PROD67_noVTPread , production trigger rgm_6GeV_inb_v1_0.trg . At the end of each run, follow the STANDARD DAQ RESTART SEQUENCE
References and Standards:(last update 01/18/2022- 23:30 Nominal Beam Positions
FSD Thresholds
Reference Harp Scans for Beam on Faraday Cup: 2H01 [1] Reference Harp Scans for Beam on Tagger dump: 2C21 [2], tagger harp [3] Reference Monitoring Histograms (6 nA, production C) [4] Old reference Monitoring Histograms (50 nA, production LD2) [5] Counter rates
Beamline vacuum: should be not higher than 5e-5. |
Notes
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.
Turn DC HV off only for beam tuning; if no beam is available or when the beam is stable, keep them on even if you are not taking data.
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Known Issues
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In case of other questions or uncertainties of what to do, call the RC or PDL (remote) shift worker: see dedicated Remote Shifts tab above. |
TasksEvery Run:
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Webcams
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Manuals |
Hall Webcams |
Epics on the web
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Live Monitoring Links
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Hall-B
Run lists |
AcceleratorReferences |
ZOOM meetings
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