Fall 2014 Commissioning Plan

General Information

• Goals
  1. Clean tune of the electron beam into the Tagger Dump
  2. Commissioning of the unpolarized photon beam
  3. Commissioning of the Hall D equipment under "soft" conditions:
     • low-intensity unpolarized photon beam <10 MHz/GeV at the endpoint
     • thin solid targets instead of the regular liquid hydrogen target
     • solenoid current 1200 A instead of the nominal 1300 A
• Schedule and Hall Availability: The accelerator run is scheduled for 19-Sep-14 - 22-Dec-14. 3 week are assigned for Hall D commissioning with photon beam (see [1]). The tentative plan is:
  1. Accelerator: beam recovery and 5.5 pass beam tune to the dumplette Sep 19-29. Hall D/Tagger are open.
  2. Accelerator: electron beam tune to the Tagger Dump, 29-Sep-14 - 03-Oct-14. Hall D/Tagger are locked. TAGM and the electronics are removed from the Tagger Hall.
  3. Accelerator/Hall D: Photon beam tune to Hall D and the initial equipment checkout, Oct 4-5. Halls are locked.
  4. Hall D: Re-installation of the Tagger equipment (TAGM and the electronics), Oct 6-11. Halls are open.
  5. Hall D: Equipment commissioning with photon beam, Oct 12-31. Halls are locked.
• Expected Staffing:
  • Run Coordinator: Alexandre Deur
  • Online Shifts: 3 persons per shift, one with solenoid training.
  • Offline Shifts: at least two people looking at data written to tape.
• Coordination Activities:
  • MCC meetings at 7:50am and 8:00am
  • Daily run meeting broadcast on bluejeans 10:30am?? Meeting will be in the counting house conference room.
  • Links to accelerator schedules:
    • CEBAF 12 GeV Commissioning calendar
    • Scheduled Accelerator Down (SAD)/Maintenance Calendar
    • http://accboard.acc.jlab.org/
• Activity Priority
  • High: Activity should be completed, contingencies in place for issues.
  • Medium: Desirable to complete the activity.
  • Low: Activity would be useful if time permits us to do it.
• Activities planned for the next run in Spring 2015:
  • Installation of liquid hydrogen target.
  • Installation of diamond radiator in goniometer.
  • Running at 1300A solenoid current.