Difference between revisions of "The HPS Run Wiki"
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# Follow the instructions under "Procedures" on the documentation tab for "Beamline" to establish beam to the electron dump. In order to have reliable readings on two important BPMs, 2H00 and 2H02, beam current should be >25 nA. All studies should be done with beam currents between 25 nA and 30 nA. | # Follow the instructions under "Procedures" on the documentation tab for "Beamline" to establish beam to the electron dump. In order to have reliable readings on two important BPMs, 2H00 and 2H02, beam current should be >25 nA. All studies should be done with beam currents between 25 nA and 30 nA. | ||
#* If needed move SVT protection collimator up/down to see beam clearly on the viewer (motion should not be more than a 1mm, the preset positions should be good to few hundred micrometers). | #* If needed move SVT protection collimator up/down to see beam clearly on the viewer (motion should not be more than a 1mm, the preset positions should be good to few hundred micrometers). | ||
| − | #* Before moving forward with 2H02A harp scans and beam profile tune, stripline BPMs 2H00 and 2H02 must be calibrated and orbit lock must be operational. | + | #* <b> Before moving forward with 2H02A harp scans and beam profile tune, stripline BPMs 2H00 and 2H02 must be calibrated and orbit lock must be operational.</b> |
| − | # The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.05 mm, and the tilt angle <15 degrees. If beam profile is not exactly as required, but beam is stable, the following still can be done: | + | # The required beam profile at 2H02A harp is: X-width <~0.25 mm, Y-width <~ 0.05 mm, and the tilt angle <15 degrees. If beam profile is not exactly as required, but beam position on BPM is stable within 0.2 mm in X and 0.05mm in Y, the following still can be done: |
| + | #* Verify positions and sizes of SVT protection collimator holes as assigned on the GUI. | ||
#* Center beam on HPS using ECal rates (see instructions under "Procedures" on the documentation tab for "Beamline"). | #* Center beam on HPS using ECal rates (see instructions under "Procedures" on the documentation tab for "Beamline"). | ||
#* Mark the beam position on the chromox screen and turn on HPS chicane magnets. | #* Mark the beam position on the chromox screen and turn on HPS chicane magnets. | ||
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# <b> If you change beam current, turn orbit locks off first, there is a current - position dependence on the stripline BPMs 2H00 and 2H02 </b> | # <b> If you change beam current, turn orbit locks off first, there is a current - position dependence on the stripline BPMs 2H00 and 2H02 </b> | ||
# Do NOT change chicane magnet currents when beam is on | # Do NOT change chicane magnet currents when beam is on | ||
| − | # Do not run more than | + | # Do not run more than 60 minutes above 30 nA without the beam blocker in front of Faraday cup. Put beam blocker in for long running at high currents. |
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Revision as of 22:12, 5 February 2016
[edit]
HPS 2016 run, February 4 to March 14, weekends only.
Shifts are manned from Friday 3pm to 7am on Monday.
Beam energy 2.3 GeV (1 pass).
Important: Document all your work in the logbook!
Phone NumbersShift ScheduleShift-Taker's ChecklistHot CheckoutBeam Time AccountingHPS Run Spreadsheet |
Procedures
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Manuals |
JLab Logbooks
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RC: Stepan Stepanyan (Bluejeans info for Run Meetings on Thursdays and Fridays at 3pm)
- (757) 575-7540
- 9 575 7540 from Counting Room
PDL: Harut Avagyan
Run Plan for February 5 - 7, 2016:Locking up the hall
Bringing beam to the hall (consult with RC with any problem):
Miscellaneous Notes:
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