Difference between revisions of "The HPS Run Wiki"
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* After tagger magnet is degaussed, change beam configuration on "bta" GUI to "Electron" | * After tagger magnet is degaussed, change beam configuration on "bta" GUI to "Electron" | ||
* Insert Chromax screen on the downstream viewer on the beam. Note correctors at 2H02 have been disabled. | * Insert Chromax screen on the downstream viewer on the beam. Note correctors at 2H02 have been disabled. | ||
− | <b> Move beam with upstream correctors only | + | <b> Move beam with upstream correctors only This will guarantee small angles through HPS and safety of SVT <b> |
* Restore 5 nA CW beam and make sure beam is ~centered on the downstream screen. Record spot. | * Restore 5 nA CW beam and make sure beam is ~centered on the downstream screen. Record spot. | ||
− | <b> Beam should be centered using correctors on 2C21, 2C23, and 2C24 girder | + | <b> Beam should be centered using correctors on 2C21, 2C23, and 2C24 girder <b> |
* If everything looks normal, rates on downstream counters are <10Hz, and on HPS-L and HPS-R are <30Hz at 10nA, send main HPS scaler GUI to the logbook and proceed | * If everything looks normal, rates on downstream counters are <10Hz, and on HPS-L and HPS-R are <30Hz at 10nA, send main HPS scaler GUI to the logbook and proceed | ||
* Use 2H02A harp to measure beam profile (beam current should not exceed 20 nA), beam size should be X-width ~250 um Y-width < 50 um. Beam should be within ~1mm of recent measurements. | * Use 2H02A harp to measure beam profile (beam current should not exceed 20 nA), beam size should be X-width ~250 um Y-width < 50 um. Beam should be within ~1mm of recent measurements. |
Revision as of 17:06, 19 March 2015
Important Phone NumbersShift ScheduleChecklists |
Procedures |
Manuals |
JLab Logbooks
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RC: John Jaros
PDL: Harut AvagyanEvery Shift:
SVT InstructionsBefore sending beam to Faraday cup, verify (and page expert if otherwise):
The first time sending beam to the Faraday cup after the hall is closed, page the SVT expert. Every Run:
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Run Plan:March 19-20, 2015 (day/swing/owl)Overview: Machine will stop at noon for LCW heat exchanger replacement. No beam to Hall B before noon. Machine restarts ~5PM. So day shift is cancelled, but swing and owl shifts are on. Beams to Hall B scheduled for swing, so shift should go to controlled access in preparation and sweep hall when beams are imminent. Beams are expected mid-late swing. Program same as yesterday: 1) restore beams to tagger; (2)take beams to Hall B dump and install SVT Collimator; (3)starting Mar 20 day shift, make beams available to machine for BPM calibration; (5)set up chicane and test beam location on target Always Setup Beam to the Hall-B Tagger Dump after long down
Upstream halo counters must count <10Hz, downstream counters ~Hz
Setup Beam to the Hall-B Faraday cup Dump and Setup HPS.
Move beam with upstream correctors only This will guarantee small angles through HPS and safety of SVT
Beam should be centered using correctors on 2C21, 2C23, and 2C24 girder
Give beams to machine for BPM calibration asap in day shift. FIRST: must complete above to ensure beams are safely centered in SVT. If have extra time before day shift, proceed to chicane set up. Energize chicane.
Be very careful when changing Frascati currents to enter new current ACCURATELY. Small steps only.
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Webcams:
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Slow Controls: |
Accelerator:
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Offline: |