How-to
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General How-to's
- The Hall C Operations Manual is a thorough and up-to-date set of instructions.
- Make HCLog entries using the logbook page, or by running 'hclog' in a terminal.
- Please be concise, but clear. Assume you will need to search for, and understand, an entry 12 months from now (or longer).
- Electronic Shift Checklist should be completed once per shift.
- Beam Checkout Procedures Includes -
- Raster checks
- Harp scans
- Carbon hole check
- Hall C Raster
- If problems call Raster experts in order of listed on Expert on call page.
- Raster procedure is located at Hall C Fast Raster Setup Procedure
- The raster X and Y signals that go into the DAQ are also shown on an oscilliscope in rack CH03B14.
- DAQ Related Help
- Collimator, Sieve Controls
- EPICS screens can be found at jmenu -> <search for> "HMS coll" and you'll see both entries
- The usual collimator settings are HMS : "Large Collimator" and SHMS : "Collimator".
- The usual sieve settings are "HMS: Sieve" and SHMS: "Centered Sieve"
- Instructions for power cycling the drive controllers for the HMS/SHMS collimators. DocDB Page
- More detailed info on collimator controls. Also includes description of the collimators.
- EPICS screens can be found at jmenu -> <search for> "HMS coll" and you'll see both entries
- Hall C Scalers & xscalers instructions for HMS and SHMS.
- Gas Shed
- Drift Chamber Gas System
- See Standard Equipment Manual
- Flow and Temperature Charts (generated by iochcgs.acc.jlab.org)
- Drift Chamber Gas System
- Big Screen / Wall TVs
- High Voltage Controls
- Run 'go_hv' and follow instructions
- EPICS/Accelerator Screens
- Also includes Stripcharts, Gas System info, Collimator controls, Chamber Thresholds, Harps, Energy/Position Locks, etc...
- Hall C Drift Chamber Threshold Controls
- Hall C BPMs: Run go_bpms from the cdaq account
- How to see results of Hall C harp scans
- How to bring up the Hall C YAG Viewer camera
- How to bring up the Alarm Handler
- Counting House Cameras (Four Halls) • Run go_cameras_CH from cdaq or cvideo account
- Hall C cameras
- Hall C BCM Temperatures
- How to restore the Hall C EDTM Pulser
- How to check the HMS/SHMS shutters
- How to perform pedestal runs and determine FADC thresholds
- How to perform raster runs (this is the equivalent of spot++)
- Bull's Eye Scan -- BPM calibration instructions
- HMS discriminator threshold read back is now in the Alarm Handler (no manual check required)
- How to check the HMS discriminator threshold read back -- Obsolete
- HMS discriminator threshold added to alarm handler -- Updated entry (June, 2020)
- How to perform a BCM calibration
- How to operate the Hall-C Radiator (J/Psi Experiment)
Spectrometer Magnets
- Magnet screen is brought up on any hcdesk machine by the command go_magnets
- Note: only ONE copy of the magnet control GUI screen can be running. Creating a new one will cause the old one to disappear.
- How to operate and monitor the Spectrometer Magnets
- Spectrometer Magnets Cryogenics
- Resetting Magnet Interlocks
- How-to power cycle SHMS PLC I/O chassis: https://logbooks.jlab.org/entry/3625900
- Resetting the "ioc heartbeat epics communications" (start by clicking on the heart at upper left of the magnet controls screen
How to Rotate the HMS and SHMS
SHMS Detectors
HMS Detectors
Polarized 3He target in Hall C
Hall C Cryo-target
- Hall C 12-GeV Era Cryotarget Instructions
- Hall C target configuration for Spring 17 running
- How to operate the Hall-C Bremsstrahlung Radiator for the J/Ψ -007 Experiment (Spring 2019)
