Run Coordination Meetings:Fall2021

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Fall 2021 Run

Meeting General Agenda

Run planning meetings:

Run Planning Meeting Notes, December 2 - December 8, 2021

Run Planning Meeting Notes, November 25 - December 1, 2021

Run Planning Meeting Notes, November 18 - November 24, 2021

Run Planning Meeting Notes, November 11 - November 17, 2021

Run Planning Meeting Notes, November 4 - November 10, 2021

Connect Information

To connect from the outside by phone please do the following

1.) To join via a Web Browser, go to the page https://bluejeans.com/497773790/1473

2.) To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 497773790. Passcode is 1473.

3.) To join via phone, use one of the following numbers and the Conference ID: 497773790. Passcode is 1473.

4.) The moderator code is

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: 497773790 and #
  • Passcode is 1473 and #
  • You may have to unmute the microphone: #*4
  • Turn the computer on if needed

Beam and Hall configuration

  • Beam energy expected:
    • 10.9 GeV
  • Solenoid:
    • 1350 A
  • CW Beam:
    • 250 MHz frequency
    • 50 - 150 nA (production runs), 300 nA maximum (rate scans), < 5 nA during calibration runs
  • Radiators:
    • Goniometer radiators:
      • Diamond JD70-105 (47 μm - 3.9·10-4 R.L., 7×7 mm²) - Used for the second part of GlueX's Fall 2018 run and Fall 2019/Spring 2020.
    • Amorphous:
      • 10 µm Al (1.86·10-5 R.L.) calibration
  • Tagger quadrupole on (-4.2 A).
  • Collimator hole: Default running: 5.0 mm.
  • Targets:
    • 4He target: cryogenic target
    • LD target: cryogenic target
    • C target
  • PS converter: 750 μm
  • Miscellaneous:
    • PS test area:
      • Left arm: Check misc. sub-detectors
      • Right arm: Setup to check PbWO4 crystals
    • Other?

General Information

This document describes the run plan for the Hall D Fall 2021 run.

  • Schedule for the run:
  1. November 8: beam restoration
  2. December 6: end of the run


  • Expected Staffing and responsibilities:
    • The Run Coordinator oversees the run:
      • November 3 - November 10: 14 days: Alexander Austregesilo
      • November 10 - November 17: Lubomir Pentchev
      • November 17 - November 24: Simon Taylor
      • November 24 - December 1: Carlos Ayerbe Gayoso
      • December 1 - December 6: Holly Szumila-Vance
    • The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (M. Stevens) verify that the proper safety rules are followed. PDL is:
      • PDL: Lubomir Penchev
    • Shifts: 2 person shifts: 1 local leader and 1 (optionally remote) worker scheduled through the SRC shift scheduler.
  • 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.
    • Run meetings: broadcasted on Bluejeans. 8:45am in the counting house conference room. The Run Coordinator will be responsible for organizing and chairing the meeting.

Runplan

SRC run plan, Fall 2021

Hall D situation room (current run plan)

Hall D counting room white board camera

Accelerator status

Live Camera Feeds from the Four Counting Houses

  • These feeds SHOULD be open and visible at all times from one of the monitors in each of the counting houses.
  • Management cautions AGAINST opening them from other locations or offsite, out of concern for available bandwidth.


Setting Up Photon Beam

  1. Verify electron beam quality and establish photon beam
    • Ion Chambers trip threshold must be set using diamond JD70-105 as well as the 4 Al. radiators (1 on goni, 3 on amorphous radiator ladder)
    • Tune electron beam with radiator retracted
      • Radiator (amorphous and diamond) must be retracted. Collimator should be in blocking position.
        • Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 50 nA)
          • RAD102_P1 ~ 10 mrad/hr (tagger area, gammas, between tagger and dump)
          • RAD102_P2 ~30 mrad/hr (tagger area, gammas, on the ground below the goniometer).
          • RAD102_P3 ~ 0.3 mrem/hr (tagger area, neutrons, near electronics racks)
          • RAD508_P1 < 0.1 mrad/hr (collimator cave, gammas).
          • RAD508_P2 ~ 0. mrad/hr (Hall. Neutrons).
    • Establish good photon beam
    • Make sure tagger quadrupole is on and at -4.2 A. (It can be turned on only once the Hall is in power/beam permit.)
      • Insert 2*10-5 RL radiator. Call MCC and ask to mask the FSD and turn off beam each time a radiator is moved
        • Typical levels are (for 2×10-5 radiator, electron beam current 50 nA)
          • RAD102_P1= 35 mrad/hr (tagger area, gammas, between tagger and dump)
          • RAD102_P2= ~ 50 mrad/hr (tagger area, gammas, on the ground below the goniometer)
          • RAD102_P3= ~2 mrem/hr (tagger area, neutrons, near electronics racks)
          • RAD508_P1= ~10 mrad/hr (collimator cave, gammas).
          • RAD508_P2 < ~ 0. mrad/hr (Hall. Neutrons).
    • Verify beam position and envelope (Hovanes).
      • Ask MCC to set beam position on 5C11b to x=-0.5 mm and y=+1.0 mm.
      • Ask MCC for 5C11 and 5C11B HARP. Then do our radiator HARP scan, see instruction. If it looks good, proceed to next step. Otherwise, inform MCC.
      • Insert profiler (no need for masking FSD when an object is inserted in the photon line), run with 10×10-4 radiator and 50 nA. Beam on the profiler should be at x=0.0±0.5cm; y=0.0±0.5cm. If not, inform MCC.
    • Radiation level study (1h, collimator at 5mm):
      • Run 5 min without radiator (Call MCC and ask to mask the FSD each time the radiator is moved). Beam current: 50nA. Repeat at 100 nA and 200 nA. There is need to run the DAQ or stop the beam between each steps: the data are recorded by EPICS. However, the beam need to be off when moving to a different radiator for the next steps.
      • Run 5 min with the 10-4 radiator (Call MCC). Beam current: 50nA. Repeat at 100 nA and 200 nA
      • Run 3 min with the 3*10-4 radiator (Call MCC). Beam current: 50nA. Repeat at 100 nA and 200 nA
    • Photon flux optimization and Active Collimator calibration. Call Hovanes.
      • re-Insert the 10-4 radiator (Call MCC). Use about 100 nA beam current. This will provide the Act. Col. nominal positions for its high gain values.
      • Determine maximum photon beam transmission by doing 2D scans using the collimator x/y motions (Hovanes. 1h)
      • Repeat procedure with 2*10-5 radiator (Call MCC) and 50 nA beam current. This will provide the Act. Col. nominal positions for its low gain values.
      • Record on the white board what is the beam position on 5C11b and Active Collimator for optimal photon transmission, both for low and high Act. Col. gain.
      • Until Hovanes determines to optimal 5C11b and Active Collimator position, keep profiler in and beam locked (MCC's duty) on the nominal 5C11b and x=0,y=0 profiler position. Once Active Collimator nominal beam position is known, retract profiler and lock the beam (MCC) on the active collimator.
  1. Alignement check of JD70-105 radiator (47 μm).

Running Shifts Remote