Difference between revisions of "The HPS Run Wiki"
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== Run Plan: March 28-31, 2015 (day/swing/owl) == | == Run Plan: March 28-31, 2015 (day/swing/owl) == | ||
− | CHL1, which supplies the South Linac, has serious mechanical difficulties with a compressor. CHL2 has supplied the North Linac but is off with contaminants in the heat exchanger | + | CHL1, which supplies the South Linac, has serious mechanical difficulties with a compressor. CHL2 has supplied the North Linac but is off with contaminants in the heat exchanger which is being warmed up. No beams will be delivered over the weekend, on Monday, or probably early in the week. The situation will be assessed on Monday morning after which we should know more specifics. |
− | '''<font size=3>All HPS weekend shifts, Mar 28 day and swing, March 29 owl and day and swing, and March 30 owl | + | '''<font size=3>All HPS weekend shifts, Mar 28 day and swing, March 29 owl and day and swing, and March 30 owl are cancelled. In addition, Mar 30 day is also cancelled. </font>''' |
− | While the prognosis is not good, it may be possible to run a low energy program that uses just one CHL. This could possibly provide HPS with beams of 1.1 and 2.2 GeV. High energy (10-11 GeV) running would not be possible in this scenario. We hope to learn the long term plans on Monday. | + | While the prognosis is not good, it may be possible to run a low energy program that uses just one CHL. This could possibly provide HPS with beams of 1.1 and 2.2 GeV. High energy (10-11 GeV) running would not be possible in this scenario. We hope to learn more about the long term plans on Monday. |
When we're back: 1) MCC re-tunes upstream beam;(2) When beams are acceptable, MCC restores beams to alcove;(3) When decent beams have been reestablished, calibrate downstream bpms (4) post calibration, require good spot on Chromax, low counts on halo counters, and then set-up chicane. 5) scan target vertically and horizontally, measure halo rates vs target; (5) Take data. Subsystem commissioning studies: more trigger commissioning studies, beam trip studies once orbit locks are on. | When we're back: 1) MCC re-tunes upstream beam;(2) When beams are acceptable, MCC restores beams to alcove;(3) When decent beams have been reestablished, calibrate downstream bpms (4) post calibration, require good spot on Chromax, low counts on halo counters, and then set-up chicane. 5) scan target vertically and horizontally, measure halo rates vs target; (5) Take data. Subsystem commissioning studies: more trigger commissioning studies, beam trip studies once orbit locks are on. |
Revision as of 17:23, 28 March 2015
Important Phone NumbersShift ScheduleShift-Taker's Checklist (old)Hot CheckoutBeam Time Accounting |
Procedures
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Manuals |
JLab Logbooks
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RC: John Jaros
PDL: Stepan StepanyanEvery Shift:
SVT InstructionsBefore sending beam to Faraday cup, verify (and page SVT expert if otherwise):
The first time sending beam to the Faraday cup after the hall is closed, page the SVT expert.
Acceptable Beam Conditions:Before accepting beam, make sure all the conditions are met - beam profile and halo rates are what you expect (or very close to it). If unsure call to RC, PDL, or beamline expert!
Always read previous log entries, compare settings of BPMs and correctors with previous settings using scaler_hps GUI. Every Run:
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Run Plan: March 28-31, 2015 (day/swing/owl)CHL1, which supplies the South Linac, has serious mechanical difficulties with a compressor. CHL2 has supplied the North Linac but is off with contaminants in the heat exchanger which is being warmed up. No beams will be delivered over the weekend, on Monday, or probably early in the week. The situation will be assessed on Monday morning after which we should know more specifics. All HPS weekend shifts, Mar 28 day and swing, March 29 owl and day and swing, and March 30 owl are cancelled. In addition, Mar 30 day is also cancelled. While the prognosis is not good, it may be possible to run a low energy program that uses just one CHL. This could possibly provide HPS with beams of 1.1 and 2.2 GeV. High energy (10-11 GeV) running would not be possible in this scenario. We hope to learn more about the long term plans on Monday. When we're back: 1) MCC re-tunes upstream beam;(2) When beams are acceptable, MCC restores beams to alcove;(3) When decent beams have been reestablished, calibrate downstream bpms (4) post calibration, require good spot on Chromax, low counts on halo counters, and then set-up chicane. 5) scan target vertically and horizontally, measure halo rates vs target; (5) Take data. Subsystem commissioning studies: more trigger commissioning studies, beam trip studies once orbit locks are on. When we're back, proceed with program MCC works on beam optics and matching, and tunes beam to tagger
Standards are on this page: ACCEPTABLE BEAM CONDITIONS.
Restore Beam to the Hall-B Dump
Energize Chicane
Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps (few amps) only.
Are we centered? Beamline Expert should enter new target positions if not.
Subsystem Commissioning Studies. Begin Data Taking. DO NOT RUN MORE THAN 30 MINUTES ABOVE 50 nA WITHOUT THE BEAM BLOCKER
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Webcams:
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Slow Controls: |
Accelerator:
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Online & Offline: |