The HPS Run Wiki

From hps run
Jump to navigation Jump to search


[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 14-15 (morning)

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

  • 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

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

  • Ask MCC to turn OFF the beam, turn OFF and degous tagger magnet
  • After tagger magnet is degaussed, change beam configuration on "bta" GUI to "Electron"
  • Insert Chromax screen on the downstream viewer on the beam
  • Start with tune mode beam, make sure beam is centered on the downstream viewer before going to CW
  • Ask for ~10 nA beam, watch cctv6 to make sure spot on the downstream viewer is clear and approximatly at the center of the screen
  • Check to make sure Faraday cup and nA BPMs read similar curents
  • Check beam position stability on 2H01 nA BPM
  • If everything looks normal, rates on downstream counters are <10Hz, and on HPS-L and HPS-R are <30Hz at 10nA, proceed
  • Use 2H02A harp to study beam profile (beam current should not exceed 20 nA), beam size should be X ~250 um Y < 150 um
  • using downstream viewer GUI insert YAG then OTR screen. If beam is not well visible on these viewers, use the expert GUI to find proper position for each to have clear picture of the beam spot
  • Energize HPS chicane - ask MCC to turn beam OFF, ramp up magnets to desired currents according to procedures (use the table)
  • After magnets are at required settings (will take ~40 min) ask MCC for 10 nA beam
  • Observe beam spot on chromox viewer, beam spot should be at the same place as before magnets were turned ON. If spot is shifted, change Frascati magnets curent to correct the posiotion - if beam is left of the original point current must be lowered, if it is shifted right current must be increased. Do current change with small steps, ~Amp
  • After chicane is set, record halo counter rates, turn beam off and insert HPS target, 4um W
  • Using table provided change chicane settings to move beam left and right on the target with ~1mm step. First move righ, stop when rates on halo counters will increase by several times, then move left until rates will start to go up. Turn beam off rvery time currents are changed
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