Difference between revisions of "Run Group M"
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*Note 13: Do a RICH recovery (press the RICH Recovery button on the GUI) once daily during the day shift between runs. | *Note 13: Do a RICH recovery (press the RICH Recovery button on the GUI) once daily during the day shift between runs. | ||
− | *Note 14: Cycle the FMT Gas once | + | *Note 14: Cycle the FMT Gas once per shift. If done rapidly without pausing (Gas "stop"-"yes"-"start"-"yes"), the HV should not crash. |
Revision as of 14:16, 15 December 2021
Shift ScheduleESAD, COO, RSAD Read before shift!!!Shift 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+[10 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 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: Stephen Bueltmann
- (757) 575-7540
- 9 575 7540 from Counting Room
- bueltman@jlab.org
PDL: Eugene Pasyuk
- (757) 876-1789
- 9 876-1789 from Counting Room
- pasyuk@jlab.org
Run Plan: Dec 15 - Dec 21 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
- Take 2H data at 50 nA
- Friday 0730, switch to 4He target.
- follow procedures to restore beam
- check DC occupancy at 60 nA
- check beam blocker calibration
- take data at 60 nA
- 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 12/14/2021- 22:10) 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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