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[edit]

RC: John Jaros

  • (757) 575-7540
  • 9 575 7540 from Counting Room

PDL: Stepan Stepanyan

Every Shift:

  1. Follow run plan as outlined by RC
  2. Once BPMs are calibrated, ask MCC if orbit locks are on, they should be.
  3. Keep shift summary up-to-date in HBLOG. Record all that happens.
  4. Document any beam condition change and send scaler GUIs to HBLOG
  5. Send "scaler_hps" GUI to logbook at least twice per shift or at any time run conditions change
  6. Peform 2H02A harp scan once per shift or when beam conditions have changed, based on beam monitors (BPMs, halo rates, beam-viewer)
  7. Fill out shift checklist in the logbook, HBLOG, using template at least ones per shift or when run conditions change
  8. Continuously check quality of data
  9. With any issue contact On-Call Experts or RC.

SVT Instructions

Before sending beam to Faraday cup, verify (and page SVT expert if otherwise):

  • SVT should be open: "Position" at 0.000 mm in scaler GUI
  • SVT HV is off: all red/green indicators RED in SVT bias GUI

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!

  • Beam optics setting is such that at 2H02A harp the beam profile will be as requested by HPS,wide in X-direction and narrow in Y.
  • This optics setting will make the beam profile at 2C21 harp narrow in both directions, while profile on the "tagger" or 2C24 harp wide in both directions.
  • The halo counter rates before HPS must be low:
    • UPS-L and UPS-R few Hz/nA,
    • if tagger magnet is energized TAG-L/T/T2 ~10Hz/nA [1],
    • if beam is going to Faraday cup dump then tagger counters and downstream counters should count <<1 Hz/nA
  • The halo counter rates on HPS, HPS-L/R/T/SC, depends on the collimator and HPS chicane settings, but should not be more than 100 Hz/nA[2]
  • As halo counters, positions on BPMs and the settings of correctors also must be close to what where before.

Always read previous log entries, compare settings of BPMs and correctors with previous settings using scaler_hps GUI.

Every Run:

  1. a
  2. b
  3. c
  4. d


MCC Daily Meetings




DO NOT RUN MORE THAN 30 MINUTES ABOVE 50 nA WITHOUT THE BEAM BLOCKER
PUT BEAM BLOCKER IN FOR LONG RUNNING AT HIGH CURRENT

Run Plan:March 26-27, 2015 (day/swing/owl)

Yesterday: Things were proceeding well when a power outage hit the whole accelerator complex and counting houses at about 4PM. Time since then has been spent in recovering the machine. The word is now that beams won't be back before swing tomorrow.

HPS shifts for Mar 26 day and swing and Mar 27 owl and day are cancelled.

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.

Close Hall at 4PM, call MCC for sweep, go to controlled and beam permit when MCC is ready

MCC works on beam optics and matching, and tunes beam to tagger

  • After MCC finishes beam tune and upstream bpms are calibrated
    • record harp scans at 2C21 and 2C24. These must be good scans, good S/N, no tails, and low halo count rates before proceeding.

Standards are on this page: ACCEPTABLE BEAM CONDITIONS.

    • make sure no bleedthrough-- counts when no beam?
    • After beam tune is done send HPS scaler GUI to the logbook with comments

Restore Beam to the Hall-B Dump

  • Ask MCC to turn OFF the beam.
  • Turn off tagger magnet and change beam configuration to "bta" GUI to "Electron"
  • Have MCC degauss magnet
  • Make sure target is out
  • Insert Chromax screen on the downstream viewer
  • 4mm SVT Protection collimator in place
  • Restore 1 nA CW beam and have MCC bring beam to y~-5mm; x~5mm on the Chromax screen. (distance between dots=5mm). Record spot. Record scalers. Repeat and record 2C21 and 2C24 harp scans and corrector settings. We need these for next time!
  • 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.
  • establish orbit locks

Energize Chicane

  • follow standard procedures in Beamline manuals for procedures and settings.
  • beam spot on Chromax should be unmoved. If not, tune Frascati slightly. See caution below.

Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps (few amps) only.

  • Turn beam off and insert HPS target, 4um W. Restore beam. Check count rates.
  • Do horizontal scan of beam on target. Using table provided, first change Frascati settings, then PS settings to move beam left and right on the target with ~1mm step. Small changes only. Return to nominal beam position.
  • Do vertical scan of target at nominal beam position. Measure halo counter/ecal rates vs target position. Record data and graph.

Are we centered? Beamline Expert should enter new target positions if not.

  • Do scan of SVT collimator, measuring counter rates vs SVT collimator position with nominal beam position.
  • If Omar and beamline expert are available during day or swing, do SVT Wire Scan. This still needs an expert. Orbit locks must be temporarily removed to move beam horizontally with upstream correctors, if needed. Restore orbit locks when done.

Subsystem Commissioning Studies. Begin Data Taking.

  • Make sure DAQ is OK for data taking
  • More Trigger commissioning data runs. See Valery's note on the run Wiki under commissioning trigger.
  • If orbit locks are on, call Rafayel for beam trip study. Take 4 hours of beam trip data with wire up; take 4 hours of beam trip data with wire down.
  • Absent other requests, take data at 50 nA. Be sure to block Faraday cup if higher current.



Beam
Energy ~2.0 GeV
Current < 200.0 nA CW
Position
X Y
~0 mm ~0 mm
Profile
X Y
< 0.1 mm < 0.1 mm
Target
#1 0 mm
Magnets
PS Current 0 A
Chicane Dipole #1 0 A
Chicane Dipole #2 0 A
DAQ
Configuration ___________________
Configuration file
Prescales
Thresholds
Events Per Run
Dead Time




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Run Coordinator
March 1 - March 11 Stepan Stepanyan
March 12 - March 18 Francios-Xavier Girod
March 19 - April 1 John Jaros
April 2 - April 8 Nathan Baltzell
April 9 - April 15 Takashi Maruyama
April 16 - April 22 Maurik Holtrop
April 23 - April 29 Raphael Dupre
April 30 - May 6 Takashi Maruyama
Physics Division Liaison
Stepan Stepanyan
Beamline On-Call
NOW Takashi Maruyama
DAQ On-Call
NOW Sergey Boyarinov
ECAL On-Call
March 1 - March 9 Andrea Celentano
March 9 - March 23 Nathan Baltzell
March 23 - March 30 Holly Vance
March 30 - April 13 Gabriel Charles
April 13 - April 20 Raphael Dupre
April 20 - April 27 Michel Garcon
April 27 - May 4 Holly Vance
SVT On-Call
March 8 - March 14 Sho Uemura
March 15 - March 28 Omar Moreno
March 29 - April 4 Pelle Hansson
April 5 - April 8 Omar Moreno
April 9 - April 19 Matt Graham
April 20 - April 26 Tim Nelson
April 27 - May 4 Sho Uemura
SlowControls On-Call
March 1 - March 18 Hovanes Egiyan
March 19 - April 1 Stepan Stepanyan




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