Fall 2018 GlueX Run

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Fall 2018 GlueX Run

Connect Information

To connect from the outside by phone please do the following

1.) To join via a Web Browser, go to the page [1] https://bluejeans.com/660743227.

2.) To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 660743227.

3.) To join via phone, use one of the following numbers and the Conference ID: 660743227.

4.) The moderator code is 8394

Dial Either +1 408 740 7256 or +1 888 240 2560 for US or Canada

Specific instructions for connecting from JLab's Hall D conference room:

  • Turn polycon on if necessary (do it before turning the computer on)
  • With the polycon, place a call at 199.48.152.152
  • Press # to enable the polycom keypad, then enter the meeting id: 660743227 and #
  • You may have to unmute the microphone: #*4
  • Turn the computer on if needed

Beam and Hall configuration

  • Beam energy expected:
    • 11.640 GeV (same value as Fall 2016 to Spring 2018) until Nov. 15th.
    • Then 10.3 GeV until Dec. 10th.
    • Then 9.0 GeV until Dec. 19th.
  • Solenoid on at 1350A for the 3 energies. ComCal commissioning with solenoid off. Any other field changes should be avoided if possible.
  • CW Beam current:
    • Range: 1 nA-1.5 μA. 250 MHz frequency.
    • Standard production running expected at 530 nA on 1.4·10-4 R.L. radiator (17 μm diamond).
    • RSAD limit for most of the run, excluding high intensity tests: 600 nA on 1.6·10-4 R.L. radiator.
  • FFB on or Position Slow Lock on (FFB doesn't operate below 50nA).
  • Radiators:
    • Goniometer radiators:
      • Diamond JD70-104 (17 μm - 1.4·10-4 R.L., 7×7 mm²) - wider rocking curve - Tested in Spring 2018: Yielded reasonable polarization.
      • Diamond JD70-105 (47 μm - 3.9·10-4 R.L., 7×7 mm²) - new crystal - good rocking curve
    • 40 μm Al radiator (44.9·10-5 R.L.)
    • V-wire (for TAC run).
    • Amorphous
      • 1.5 µm Al (1.7·10-5 R.L.)
      • 10 µm Al (11.2·10-5 R.L.)
      • 30 µm Al (33.7·10-5 R.L.)
  • Tagger quadrupole on (-4.2 A).
  • Collimator hole: Both 5 mm diameter and 3.4 mm diameter. Default running: 5.0 mm, including with 17 μm diamond.
  • Miscellaneous:
    • DIRC will be installed
    • Transition Radiation Detector in the Hall
    • Muon chamber will not be in the hall (location interferes with DIRC)

General Information

This document describes the run plan for the Hall D Fall 2018 run.

  • Schedule for the run:
  1. Aug. 15th - 21st: Electron beam restoration
  2. Aug. 21st - Oct. 28th: GlueX-I run (E=11.64 GeV).
  3. Oct. 28th - Nov. 19th: DIRC and ComCal installation (Solenoid will be ramped down but kept cool? )
  4. Nov. 20th - Dec. 09th: GlueX-II and Primex tests. Lower energy measurement checks. (E=10.3 GeV)
  5. Dec. 10th - Dec. 12th: Linac energy change.
  6. Dec. 13th - Dec. 19th: GlueX-II and Primex tests. Lower energy measurement checks. (E=9.0 GeV)
  1. Every Tuesdays: 12h of beam study. Every Thursdays, if necessary: 8h of RF recovery.
  • Accelerator overall plan and priorities:
  1. Deliver physics beam to 4 halls.
  • Experiment: GlueX E12-06-102 Production
  • Planned tests (Accelerator, related to Hall D):
    • Further tests of nA BPM and stripline BPM ?
    • Test fast raster beam envelope measurement with larger x-rastering. Need details plan, including time estimate
  • Planned tests (Hall D):
    • At 11.6 GeV:
      • Align JD70-105 (47 μm - 3.9·10-4 R.L., 7×7 mm²) (Hovanes) and take enough data to achieve ~1% statistic on rho polarimetry (less than a shift at 190 nA).
      • Test fast raster beam envelope measurement with larger x-rastering. (R. Jones) Need details plan, including time estimate
      • High-intensity GlueX L1 and DAQ tests (A. Somov, S. Furletov)
      • ToF trigger test for Muon chamber. With solid target. (D. Lawrence/E. Smith) Need details plan, including time estimate
      • TRD test (parasitic) (S. Furletov, L. Penchev)
    • At 10.2 and 9 GeV:
      • DIRC commissioning (J. Stevens) Need details plan, including time estimate
      • ComCal commissioning with B-Field (A. Somov?) Need details plan, including time estimate
      • Strait track run (L. Penchev)
      • ComCal test (no B-field, no DC on) (A. Somov?) Need details plan, including time estimate
      • High-intensity GlueX L1 and DAQ tests (A. Somov, S. Furletov)
  • Expected Staffing and responsibilities:
    • The Run Coordinator oversees the commissioning:
      • Aug. 15th-Aug. 21st, 7 days: Alexandre Deur (accelerator restoration)
      • Aug. 22nd-Aug. 28th, 7 days: Alexandre Deur
      • Aug. 29th-Sept 4th, 7 days: Cristiano Fanelli
      • Sept. 5th-Sept. 11th, 7 days: Colin Gleason
      • Sept. 12th-Sept. 18th, 7 days: Alexander Austregesilo
      • Sept. 19th-Sept. 25th: TBD
      • Sept. 26th-Oct. 2nd, 7 days: Naomi Jarvis
      • Oct. 3rd-Oct. 9th, 7 days: Stuart Fegan
      • Oct. 10th-Oct. 16th: TBD
      • Oct. 17th-Oct. 23rd: TBD
      • Oct. 24th-Oct. 28th: TBD
      • Oct. 29th-Nov. 17th: Hall open for installation
      • Nov. 14th-Nov. 20th, 7 days: Alexandre Deur
      • Nov. 21st-Nov. 27th, 7 days: Richard Jones
      • Nov. 28st-Dec. 4th, 7 days: Wenliang Li
      • Dec. 5th-Dec. 11th: TBD
      • Dec. 12th-Dec. 20th: Jeorg Reinhold
    • The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (M. Stevens) verify that the proper safety rules are followed. PDLs are:
      • Benedikt Zihlmann.
    • The analysis coordinator (Alexander Austregesilo) oversees the off-line diagnostic of the different systems and analysis of the data.
    • Shifts: 2 persons per shift.
  • Coordination Activities:
    • The RC will attend the MCC meetings at 7:45am and 8:00am and the weekly MCC meeting (Wednesday, 1:30pm). The PDL will attend the weekly MCC meeting.
    • Daily run meetings broadcasted on Bluejeans will occur at 8:45am in the counting house conference room. The Run Coordinator will be responsible for organizing and chairing the meeting.
  • Useful links:
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