The HPS Run Wiki

From hps run
Jump to navigation Jump to search


[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
  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 any time run conditions change
  6. Peform 2H02A harp scan ones per shift or when beam conditions 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 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

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 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 calibrates upstream bpms

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

Restore Beam to the Hall-B Faraday cup Dump and Setup HPS.

  • 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"
  • Make sure target is out
  • Insert Chromax screen on the downstream viewer on the beam.
  • 4mm SVT Protection collimator in place
  • 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.

Energize Chicane

  • 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.

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

  • Turn beam off and insert HPS target, 4um W
  • 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 positon.
  • Do vertical scan of target at fixed beam position. Measure halo counter/ecal rates vs target position. Record data and graph
  • Do scan of SVT collimator, measuring counter rates vs SVT collimator position with nominal beam position.

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.
  • When SVT is ready for data, begin integrated data taking. Call Omar.
  • Absent other requests, take data at 50 nA.

Turn beams over to MCC during day shift March 23 for bpm calibration



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




AccumulatedCharge.png


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




Svtpic.png

Ecalpic.png