Run Coordination Meetings:Spring2023

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Spring 2023 Run

Run Statistics Google Spreadsheet. 

GlueX experiment (January 12 - March 20 2023)


Connect Information

To connect from the outside by phone please do the following

1.) To join via ZoomGov: connect Meeting ID: 160 199 0060 / Passcode 8394

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:
    • 11.55 GeV
  • Solenoid:
    • 1350A
  • CW Beam:
    • 250 MHz frequency.
    • Range: 1 nA-900 UP TO 2uA FOR 3 SHIFTS
    • Chopper slit: TBD (assume C, since Hall C will be at 5-pass all the time)
    • Standard current and radiators
      • ~350 nA on a 4.1·10-4 R.L. radiator (50 μm diamond). (RSAD limit 500nA on 58 μm diamond)) Is this still valid? IS 400
      • ~350 nA on a 33.7·10-5 R.L. AL radiator (30 µm Al). (RSAD limit 600nA on 30 µm Al radiator)) IS 480
  • Position Slow Lock on or FFB on (FFB doesn't operate below 50nA).
  • Radiators:
    • Goniometer radiators:
      • Diamond TBD
      • Amorphous 40 μm Al radiator (44.9·10-5 R.L.)
      • V-wire (for TAC run).
    • Amorphous
      • 1.64 µm Al (1.86·10-5 R.L., see study)
      • 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: Default running: 5.0 mm.
  • PS converter: 75 μm
  • Miscellaneous:
    • PS test area: TBD
    • Other?

General Information

This document describes the run plan for the Hall D Spring 2023 run.

  1. January 5th -12th: Electron beam restoration.
  2. January 12th - March 20th: 10 weeks for GlueX high luminosity production.
  • Accelerator overall plan and priorities: Deliver physics beam to 4 halls
    • Hall A, always at 4-pass, is scheduled stop early, on March. 13th.
    • Halls B and or C will always be at 5-pass
  • Hall D plan Tentative guess
    • Experiment: GlueX-II E12-12-002
    • One (?) TAC run.
    • Two (?) empty target runs (One at the start of the run, the other consecutive to TAC run)
    • Straight track run (?)
      • Overall, one night of good data.
    • Opportunistic tests?
  • Expected Staffing and responsibilities:
    • The Run Coordinator oversees the run:
      • January 12 - 18, 6 days: Joerg Reinhold
      • January 18 - 27, 7 days: Alexandre Deur
      • January 27 - Feb. 1st, 7 days: Edmundo Barriga
      • Feb. 1st - 8th: 7 days: Beni Zihlmann
      • Feb. 8th - 15th: 7 days: Igal Jaegle
      • Feb. 15th - 22nd: 7 days: TBD
      • Feb. 22nd - March 1st: 7 days: Susan Schadmand
      • March 1st - March 8th: 7 days: Tolga Erbora
      • March 8th - March 15th: 7 days: Churamani Paudel
      • March 15th - March 20th: 5 days: Richard Jones
    • The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (S. Spiegel) verify that the proper safety rules are followed. PDL is:
      • PDL: B. Zihlmann
    • The analysis coordinator (Alexander Austregesilo) oversees the off-line diagnostic of the different systems and analysis of the data.
    • Shifts: 2 person shifts: 1 local leader and 1 (optionally remote) worker scheduled through the GlueX 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 Zoom. 8:45am in the counting house conference room. The Run Coordinator will be responsible for organizing and chairing the meeting.

Runplan

  1. Verify electron beam quality and establish photon beam (assume 1 day).
    • Ion Chambers trip threshold must be set using diamond TBD 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):
      • 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. (20 + 20 mins). 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.
  2. Detector and beamline checkout.
    • Any time before starting production (beam quality is not important): microscope HV scan (2h, R. Jones)
    • Reestablish L1 trigger (Alex. Somov. 2h?? ).
    • PS and TAGH HV scan. (Alex. Somov. 1h).
    • Reestablish DAQ (Sergei, 2h?? ).
    • General detector calibration (Sean Dobbs. (703-887-1776) 1h). Use 2×10-5 Al. radiator. Beam current 200nA
      • Run 15 min (solid time) in Long Mode (Mode 10)
      • Run 15 min (solid time) in Production Mode (Mode 9).
  3. CDC HV scans (Naomi 6h). Use 4.5×10-4 Al. radiator (on goni). Beam current 360nA
  4. Diamond Which one is TBD alignement check. (Hovanes. 8h?? ).
  5. GlueX-II production
    • Standard configuration: TBD diamond, 350 nA, 5 mm hole, TPol on 75 μm TPol convertor. 2h runs and no more, as it may be hard to correct for calibration drifts. Cycle over 5 sets of runs: 0o, then 90o, then 45o, then 135o, then amorphous runs.
      • Amorphous runs: 4.5×10-4 Al. radiator (on goni). 350 nA
    • Log in run information in the shift summary (make a run list). For each production run, log useful comments on DAQ comment window, see [1]
    • Tagger quadrupole on
    • Harp scan (30 min): Every 2 days
    • Two?? Empty target run (2h: 1- h to empty/fill back the target, 1h running). Standard production current. To be done after TAC run, beam study or RF recovery.
  6. One?? "TAC" run.
    • Long mode 10 min run. Once a week (20 min).
    • Amorphous run. Every set of 4 diam. orientation runs. 1h Standard production current. Time to switch from pol. to unpol.: 10min. time to switch from unpol. to pol.: 30min.

Hall D situation room (current run plan)

Hall D counting room white board


Accelerator status

Hot Checkout

To be completed by Jan. 10th??

0% ready ; 0% checked ; 100% not ready

Readiness for Spring 2023 run

  • Solenoid (Tim/Eugene/Beni):
  • Surveys (Tim/Scott)
  • DAQ (Sergei).
  • Trigger (Alex Somov).
  • Beam line
    • Diamond status (Tim/Hovanes).
    • Tagger hodoscope (A. Somov).
    • Tagger microscope (R. Jones/Beni).
    • Goniometer (Hovanes).
    • Collimator Motion (Hovanes).
    • Active collimator detectors(Richard)
    • Profiler (Hovanes)
    • Luminosity monitor (aka Active Target) (Hovanes).
    • Halo monitors (Hovanes)
    • Pair Spectrometer (Alex Somov)
    • Polarimeter (M. Dugger/Beni/Fernando).
    • LH2 Target (Tim/A. Deur)
    • TAC (Alex Somov).
    • Slow control (Hovanes).
    • RF (Sergei)
    • Radiation monitors (A. Deur)
    • x-ray W shield (Tim/Lubomir).
  • Detector systems
    • Start Counter (Beni)
    • FDC (Lubomir).
    • CDC (Beni).
    • Gas system (Beni/Lubomir)
    • BCal (Malte/Mark Dalton)
    • FCal (Mark Dalton)
    • TOF (Beni).
    • DIRC (Justin).
    • Monitoring (Alexander Austregesilo)
  • RSAD and ESAD Safety documents (Beni):
  • Hall Status/safety (Tim/Scott)
  • Other topics?

Live Camera Feeds from the Four Counting Houses

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

Running Shifts Remote