The HPS Run Wiki

[edit]

• Shift Documentation
• Short Term Schedule
• Long Term Schedule
• Monitoring

Important Phone Numbers Shift Schedule Checklists Shift-Taker's Checklist (old) Hot Checkout Beam Time Accounting

Procedures Commissioning Plans: Beamline Trigger ECal SVT SVT TOSP (1,2,3) Tunnel/Hall Access

Manuals Harp Scans SVT ECal (Annex) DAQ (CLAS Wiki (copy)) Beamline Turning ON/OFF chicane Slow Controls

JLab Logbooks MCC Hall-A Hall-B Hall-C Hall-D

RC: John Jaros (757) 575-7540 9 575 7540 from Counting Room PDL: Harut Avagyan Every Shift: Follow run plan as outlined by RC Ask MCC if orbit locks are on, they should be. Keep shift summery up-to-date in HBLOG Document any beam condition change and send scaler GUIs to HBLOG Send "scaler_hps" GUI to logbook at least twice per shift or any time run conditions change Peform 2H02A harp scan ones per shift or when beam conditions changed based on beam monitors (BPMs, halo rates, beam-viewer) Fill out shift checklist in the logbook, HBLOG, using template at least ones per shift or when run conditions change Continuously check quality of data 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: a b c d MCC Daily Meetings

Run Plan:March 19-20, 2015 (day/swing/owl) Overview: Machine will stop at noon for LCW heat exchanger replacement. No beam to Hall B before noon. Machine restarts ~5PM. So day shift is cancelled, but swing and owl shifts are on. Beams to Hall B scheduled for swing, so shift should go to controlled access in preparation and sweep hall when beams are imminent. Beams are expected mid-late swing. Program same as yesterday: 1) restore beams to tagger; (2)take beams to Hall B dump and install SVT Collimator; (3)starting Mar 20 day shift, make beams available to machine for BPM calibration; (5)set up chicane and test beam location on target Always Setup Beam to the Hall-B Tagger Dump after long down After MCC finishes beam tune make sure beam conditions haven't changed, beam position and halo counter rates are as before (see logbook from previous days) work with MCC to move bean position and direction to see if lower counts on upstream halo counters can be achieved (UPS-L and UPS-R) Upstream halo counters must count <10Hz, downstream counters ~Hz Perform harp scans to verify that beam profile hasn't changed, check with previous scan results: 2C21 x/y widths <50 micron, on the tagger/2C24 harp x/y widths ~300 micron. Use UPS-L for analysis, send harp scan results to the logbook After beam tune is done send HPS scaler GUI to the logbook with proper comment Setup 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" Insert Chromax screen on the downstream viewer on the beam. Note correctors at 2H02 have been disabled. Move beam with upstream correctors only This will guarantee small angles through HPS and safety of SVT Restore 5 nA CW beam and make sure beam is ~centered on the downstream screen. Record spot. Beam should be centered using correctors on 2C21, 2C23, and 2C24 girder If everything looks normal, rates on downstream counters are <10Hz, and on HPS-L and HPS-R are <30Hz at 10nA, send main HPS scaler GUI to the logbook and proceed Use 2H02A harp to measure beam profile (beam current should not exceed 20 nA), beam size should be X-width ~250 um Y-width < 50 um. Beam should be within ~1mm of recent measurements. Record Ecal count rates top vs bottom. Beam centered vertically? Turn beam off. Insert SVT Protection Collimator 4mm slit to its nominal position. Ecal Backgrounds? Vertically scan the collimator, measuring the halo counter rates vs vertical position. Beam should be within ~1mm of center. Give beams to machine for BPM calibration asap in day shift. FIRST: must complete above to ensure beams are safely centered in SVT. If have extra time before day shift, proceed to chicane set up below. Energize chicane. If bpms have been calibrated, record scaler and bpm settings and beam location on screen. 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 chromax 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 position - 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, ~1 Amp. Be very careful when changing magnet currents when beams are on. Must enter new current ACCURATELY. Small steps only. After chicane is set, record halo counter rates, 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. Record halo counter rates and magnets currents. First move right, stop when rates on halo counters will increase by several times, then move left until rates will start to go up. Center beam on target with appropriate chicane currents just determined. Record bpm and screen shot and Ecal scalers. Do vertical scan of beam. Measure Ecal rates top/bottom vs vertical beam position. Record bpm 2H02 y and Ecal rates. Move beam vertically on bpm using upstream correctors, by 0.5 mm steps. Don't exceed 2mm motion. 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

Accelerator White Board Schedule Weekly Run Coordinator Reports MCC Daily Meetings HPS Shift Schedule

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

Webcams: Tagger Beam Dump Viewer Faraday Cup Viewer ECal Chiller Viewer ECal LV Supply Viewer Alcove Viewer

Slow Controls: HPS MYA Variables Hall B EPICS Database

Accelerator: End Station Status Accelerator Ops 1 Accelerator Ops 2 Accelerator White Board Schedule

Offline: HPS Data Catalog Jenkins Nexus