Difference between revisions of "The HPS Run Wiki"

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Beam width in any direction should not depend on the harp scan speed, any dependence will indicate beam position oscilation
 
Beam width in any direction should not depend on the harp scan speed, any dependence will indicate beam position oscilation
−
* If beam position (mean values of fitted peaks) are stable with <0.1 mm, proceed with the program, otherwise work with MCC to stabilize the beam
+
* If beam position (mean values of fitted peaks) are stable with <0.1 mm, and the widths are independent of the scan speed, proceed with the program, otherwise work with MCC to stabilize the beam
 
* Study beam tails as a function of current - perform tagger harp scans with different harp setting at 10nA, 20nA, 50nA, 100nA:
 
* Study beam tails as a function of current - perform tagger harp scans with different harp setting at 10nA, 20nA, 50nA, 100nA:
 
** nominal setting - "Speed during scan" = 0.5 and "Time between scaler reads" = 0.07
 
** nominal setting - "Speed during scan" = 0.5 and "Time between scaler reads" = 0.07

Revision as of 10:05, 14 March 2015


[edit]

RC: Stepan Stepanyan

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

PDL: Harut Avagyan

Every Shift:

  1. Follow run plan as outlined by RC
  2. Ask MCC if orbit locks are on, they should be.
  3. Keep shift summery 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.

Every Run:

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


MCC Daily Meetings

Run Plan:March 13-14 (morning)

Setup Beam to Hall-B Tagger Dump and Studies of Beam Properties.

  • Ask MCC to turn ON tagger magnet
  • Aid MCC to establish physics quality CW 1 pass beam to the Hall-B tagger dump:
  • When reasonable beam spot is achieved on the tagger dump screen perform harp scans, 2C21 and tagger (2C24) harps. Note: harp scans must be performed with 10 nA beam current
  • MCC delivers beam that is optimized for HPS, beam profile should be small at 2C21 (X/Y widths ~50 um) and should be large at tagger (2C24) harp (widths on 45/Y/X ~300 um), see previous harp scans
  • Make sure 2C21 and 2C24 nA BPMs read stable X/Y positions. Postions on both BPMs must be close to zero as much as possible (at least |X/Y|<1).
  • Make sure orbit locks are on and operational
  • Continueosly check beam positions on 2C21 and 2C24 looking strip charts. Oscilations should not be more than +/-0.05mm
  • Continue with tagger (2C24) harp scans at 10 nA to check beam position and width stability for ~ 1h - scans every 15 min with two settings of the harp
    • "Speed during scan" = 0.5 and "Time between scaler reads" = 0.1
    • "Speed during scan" = 0.1 and "Time between scaler reads" = 0.1

Beam width in any direction should not depend on the harp scan speed, any dependence will indicate beam position oscilation

  • If beam position (mean values of fitted peaks) are stable with <0.1 mm, and the widths are independent of the scan speed, proceed with the program, otherwise work with MCC to stabilize the beam
  • Study beam tails as a function of current - perform tagger harp scans with different harp setting at 10nA, 20nA, 50nA, 100nA:
    • nominal setting - "Speed during scan" = 0.5 and "Time between scaler reads" = 0.07
    • "Speed during scan" = 0.5 and "Time between scaler reads" = 0.35
    • "Speed during scan" = 0.25 and "Time between scaler reads" = 0.7

Harp settings can be changed on the GUI by typing new values in the window

For harps analysis use upstream left

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
Harut Avakian
DAQ On-Call
March 1 - May 4 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 Hovane Egiyan
March 19 - April 1 Stepan Stepanyan




Svtpic.png

Ecalpic.png

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