Difference between revisions of "Run Group M"
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== <font color=blue> Notes </font> == | == <font color=blue> Notes </font> == | ||
| − | * Note 1: The main lights in the Hall ('''dome lights''') and the Forward Carriage lights are being kept off because of light leaks affecting some of the detectors. If these lights are switched on during access, they should be switched off when leaving the Hall. Refer to these photos: | + | *Note 1: The main lights in the Hall ('''dome lights''') and the Forward Carriage lights are being kept off because of light leaks affecting some of the detectors. If these lights are switched on during access, they should be switched off when leaving the Hall. Refer to these photos: |
** ON: [https://logbooks.jlab.org/entry/3825712] | ** ON: [https://logbooks.jlab.org/entry/3825712] | ||
** OFF: [https://logbooks.jlab.org/entry/3825731] | ** OFF: [https://logbooks.jlab.org/entry/3825731] | ||
** Note that the dome lights when switched off cannot be turned back on immediately because they require 10-15 min to cool down. | ** Note that the dome lights when switched off cannot be turned back on immediately because they require 10-15 min to cool down. | ||
| − | * Note 2: 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: 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. |
** 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. | ** 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. | ||
| − | * Note 3 | + | *Note 3: When the '''beam is being delivered to the Faraday Cup''': |
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*# the Fast Shut Down elements: Upstream, Midstream, Downstream, BOM, and Solenoid should always be in the state <font color=red>UNMASKED</font> | *# the Fast Shut Down elements: Upstream, Midstream, Downstream, BOM, and Solenoid should always be in the state <font color=red>UNMASKED</font> | ||
*# No changes to the FSD threshold should be made without RC or beamline expert approval | *# No changes to the FSD threshold should be made without RC or beamline expert approval | ||
| − | *Note | + | *Note 4: Do not run more than 30 minutes with >150 W beam to Faraday cup without the beam blocker. |
| + | *Note 5: Any request for a '''special run or change of configuration''' has to be approved by the RC & documented | ||
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| + | *Note 6: Do not turn OFF FTOF HVs, even during the beam tune with CW beam (turn off if tuned/pulsed beam in the upstream beamline) | ||
*Note 7: 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. | *Note 7: 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. | ||
| − | *Note | + | *Note 10: '''Reset CLAS12MON''' frequently to avoid histogram saturation. |
| − | *Note | + | *Note 11: In case of a '''Torus and/or Solenoid Fast Dump''' do the following: |
| + | *# Notify MCC to request beam OFF and to drop Hall B status to Power Permit | ||
| + | *# Call Engineering on-call | ||
| + | *# Make a separate log entry with copies to HBTORUS and HBSOLENOID logbooks. In the "Notify" field add Probir Goshal, Dave Kashy, and esr-users@jlab.org | ||
| + | *# Notify Run Coordinator | ||
| + | *# Turn off all detectors | ||
| − | *Note | + | *Note 12: '''LTCC is NOT used''' in this experiment. HV should be kept OFF. |
| − | *Note | + | *Note 13: If responding to '''RICH or Trigger alarms''' please post screens also to RICH or HBTRIGGER logbook, respectively. |
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* In case of loss of communication with IOCBTARG, follow instructions at https://logbooks.jlab.org/entry/3502218 | * In case of loss of communication with IOCBTARG, follow instructions at https://logbooks.jlab.org/entry/3502218 | ||
** Check that no unnecessary beamline-related screens are open. This includes particularly the big beamline overview screen, but also and any motor/harp/collimator screens, and IOC health screens. | ** Check that no unnecessary beamline-related screens are open. This includes particularly the big beamline overview screen, but also and any motor/harp/collimator screens, and IOC health screens. | ||
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| + | * The error messages " ERR: Event ..." for crates tdcband1, tdcecal1 and tdcecal6 are NOT a problem | ||
<!-- * With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem. | <!-- * With any issue contact On-Call Experts or RC - do not spend more than 15-20 min trying to fix the problem. | ||
Revision as of 23:34, 26 January 2022
[edit]
- 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)
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
- "end run", if the run ended correctly then: "prestart", "go"
- if the run did not end correctly or if any ROCs had to be rebooted:
- "cancel", "reset"
- "configure", "download", "prestart", "go"
- After each step, make sure it is completed in the Run Control message window. If a ROC has crashed, find which one it is, issue a roc_reboot command ON JUST THAT ROC and try again. Contact the DAQ expert if there are any questions.
References and Standards '
(last update 01/18/2022- 23:30)
Nominal Beam Positions
- 2H01, X: -0.8 mm, Y: 0.4 mm
- 2C24, X: -2.0 mm, Y: +0.6 mm
FSD Thresholds
- Upstream: 2000 Hz
- Midstream: 2000 Hz
- Downstream: 500000 Hz
- BOM: 10000
- 5 ms dwell time
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
- Upstream counters integrated rates: 0-15 Hz (acceptable up to 100 Hz are acceptable) @50 nA.
- Midstream counters: 10-20 Hz (acceptable up to 50 Hz) @50 nA.
- Counting rates of ~ hundreds of Hz may indicate bad beam tune or bleed-through from other Halls.
Beamline vacuum: should be not higher than 5e-5.
Notes
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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. |
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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 |
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