Difference between revisions of "Run Group M"
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<b>Summary</b> | <b>Summary</b> | ||
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* Target assembly of Ar/C cell | * Target assembly of Ar/C cell | ||
* 17:00 Earliest possible Hall sweep/lockup tuning of BPM | * 17:00 Earliest possible Hall sweep/lockup tuning of BPM | ||
− | * Start beam checkout procedure | + | * Start beam checkout procedure |
− | * Luminosity scan | + | ** All HV off, ask for 5 nA, target is empty |
+ | ** Beam to tagger -> Harp scan -> Beam to Faraday Cup -> Harp scan | ||
+ | **Compare to previous Harp scan references linked below | ||
+ | * Ready for target centering call Eugene | ||
+ | * Luminosity scan start 1 nA, start a run and leave it running. Stepping in from 1 - 5nA in steps of 1nA | ||
+ | ** Make sure worker is uploading histograms, DAQ,Beamline overview snapshots with comment for what current | ||
+ | ** Call RC for setting which production current. | ||
Revision as of 17:09, 18 January 2022
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: Justin Estee
- (757) 575-7540
- 9 575 7540 from Counting Room
- esteejus@mit.edu
PDL: Valery Kubarovsky
- (757) 876-1789
- 9 876-1789 from Counting Room
- vpk@jlab.org
Run Plan: Jan 17 - Jan 18 2022
Production runs use PROD67_noVTPread and the trigger rgm_2GeV_out_No_Dc_Roads_v1.1.trg .
Run duration should be no more than 100M events or 4 hours, whichever comes first.
Summary
Jan. 18
- 07:00 call for restricted access
- Target assembly of Ar/C cell
- 17:00 Earliest possible Hall sweep/lockup tuning of BPM
- Start beam checkout procedure
- All HV off, ask for 5 nA, target is empty
- Beam to tagger -> Harp scan -> Beam to Faraday Cup -> Harp scan
- Compare to previous Harp scan references linked below
- Ready for target centering call Eugene
- Luminosity scan start 1 nA, start a run and leave it running. Stepping in from 1 - 5nA in steps of 1nA
- Make sure worker is uploading histograms, DAQ,Beamline overview snapshots with comment for what current
- Call RC for setting which production current.
DAQ configuration PROD67_noVTPread , production trigger rgm_2GeV_out_No_Dc_Roads_v1.1.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 01/12/2022- 05:00 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 (80 nA, production Ca-48) [4] Old reference Monitoring Histograms (50 nA, production LD2) [5] Counter rates
Beamline vacuum: should be not higher than 5e-5.
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General Instructions:
Note that the dome lights when switched off cannot be turned back on immediately because they require 10-15 min to cool down.
Every Shift:
Log screenshots of: (this is for the remote shifter, see dedicated Remote Shifts tab above.)
In case of other questions or uncertainties of what to do, call the RC or PDL |
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