Difference between revisions of "The HPS Run Wiki"
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== Run Plan:March 22-23, 2015 (day/swing/owl) == | == Run Plan:March 22-23, 2015 (day/swing/owl) == | ||
− | Overview: | + | Overview: Very bad beams last night. We need better standards for what is acceptable at 2C21 and 2C24, and upstream halo counters before sending beam downstream to the dump. We returned to tagger and MCC will work on calibrating upstream BPMs. Tief will work on optics matching starting 1PM today. Expect to open hall Tuesday AM, but this is still being dicussed. Program: 1) MCC retunes upstream beam and calibrates BPMs; (2) MCC works on beamline optics, hopefully restoring beams to alcove when complete;(3) when have decent beams to alcove, try to have MCC calibrate downstream BPMs;(4)get good spot on Chromax, low counts on halo counters, and then set-up chicane. 5) scan target vertically and horizontally, halo rates vs target (5) Take data. Subsystem commissioning studies: more trigger commissioning studies, SVT commissioning. |
− | '''<font size=3> | + | '''<font size=3> MCC calibrates upstream bpms </font>''' |
− | '''<font size=3> | + | '''<font size=3> MCC works on beam optics and matching, and tunes beam to tagger </font>''' |
− | * After MCC finishes beam tune | + | * After MCC finishes beam tune and upstream bpms are calibrated |
− | ** record harp scans at 2C21 and 2C24 | + | ** record harp scans at 2C21 and 2C24. These must be good scans, good S/N, no tails, and low halo count rates before proceeding. |
− | ** make sure no | + | ** make sure no bleedthrough-- counts when no beam? |
− | ** After beam tune is done send HPS scaler GUI to the logbook with | + | ** After beam tune is done send HPS scaler GUI to the logbook with explanation |
'''<font size=3> Restore Beam to the Hall-B Faraday cup Dump and Setup HPS. </font>''' | '''<font size=3> Restore Beam to the Hall-B Faraday cup Dump and Setup HPS. </font>''' | ||
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* Ask MCC to turn OFF the beam, turn OFF and degauss tagger magnet | * Ask MCC to turn OFF the beam, turn OFF and degauss tagger magnet | ||
* 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" | ||
+ | * Make sure target is out | ||
* Insert Chromax screen on the downstream viewer on the beam. | * Insert Chromax screen on the downstream viewer on the beam. | ||
− | * 4mm SVT Protection collimator in place | + | * 4mm SVT Protection collimator in place |
− | * Restore 1 nA CW beam and | + | * Restore 1 nA CW beam and have MCC bring beam to y~-5mm; x~5mm. Record spot. Record scalers. Halo counters and Ecal must have low rates to proceed. |
− | * | + | * Record position at 2H02 harp. Repeat at 10 nA. Must have good spots, nominal sizes, no tail to proceed. Position ok? |
− | + | * record scalers and beam location on screen. | |
− | * record | + | |
− | * | + | '''<font size=3> Energize Chicane </font>''' |
+ | * follow standard procedures | ||
+ | * beam spot on Chromax should be unmoved. If not, tune Frascati slightly. See caution below. | ||
+ | * SVT wire scan. Check beam position OK in x and y. | ||
<b>Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps only. </b> | <b>Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps only. </b> |
Revision as of 09:53, 23 March 2015
Important Phone NumbersShift ScheduleShift-Taker's Checklist (old)Hot CheckoutBeam Time Accounting |
Procedures |
Manuals |
JLab Logbooks
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RC: John Jaros
PDL: Stepan StepanyanEvery 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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DO NOT RUN MORE THAN 30 MINUTES ABOVE 50 nA WITHOUT THE BEAM BLOCKER Run Plan:March 22-23, 2015 (day/swing/owl)Overview: Very bad beams last night. We need better standards for what is acceptable at 2C21 and 2C24, and upstream halo counters before sending beam downstream to the dump. We returned to tagger and MCC will work on calibrating upstream BPMs. Tief will work on optics matching starting 1PM today. Expect to open hall Tuesday AM, but this is still being dicussed. Program: 1) MCC retunes upstream beam and calibrates BPMs; (2) MCC works on beamline optics, hopefully restoring beams to alcove when complete;(3) when have decent beams to alcove, try to have MCC calibrate downstream BPMs;(4)get good spot on Chromax, low counts on halo counters, and then set-up chicane. 5) scan target vertically and horizontally, halo rates vs target (5) Take data. Subsystem commissioning studies: more trigger commissioning studies, SVT commissioning.
MCC works on beam optics and matching, and tunes beam to tagger
Restore Beam to the Hall-B Faraday cup Dump and Setup HPS.
Energize Chicane
Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps only.
Subsystem Commissioning Studies. Begin Data Taking.
Turn beams over to MCC during day shift March 23 for bpm calibration
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Webcams:
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Slow Controls: |
Accelerator:
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Offline: |