Run Coordination Meetings:Summer2020

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Summer 2020 GlueX Run

Run Statistics Google Spreadsheet.

Meeting General Agenda

Run Planning Meeting Notes, July 27-August 5, 2020

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:
    • 11.408 GeV (i.e. about 200 MeV less than value for Spring 2019)
  • Solenoid:
    • 1350A
  • CW Beam:
    • 250 MHz frequency.
    • Range: 1 nA-900 nA.
    • Chopper slit: TBD
    • Standard current and radiators
      • ~300 nA on a 4.1·10-4 R.L. radiator (50 μm diamond). (RSAD limit 500nA on 58 μm diamond))
      • ~360 nA on a 33.7·10-5 R.L. AL radiator (30 µm Al). (RSAD limit 600nA on 30 µm Al radiator))
  • Position Slow Lock on or FFB on (FFB doesn't operate below 50nA).
  • Radiators:
    • Goniometer radiators: DIRC commissioning starts on 40 μm Al radiator. Then it uses production diamond.
      • Diamond JD70-103 (50 μm - 4.1·10-4 R.L., 7×7 mm²) - new crystal - good rocking curve.
      • 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. Good performance.
      • Diamond JD70-106 (50 μm - 4.1·10-4 R.L., 7×7 mm²) - Aligned and used shortly during Tagger Accidental test in Spring 2020.
      • Diamond JD70-107 (55 μm - 4.6·10-4 R.L., 7×7 mm²) - new crystal - good rocking curve
      • Diamond JD70-109 (50 μm - 4.1·10-4 R.L., 7×7 mm²) - new crystal - good rocking curve
      • 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:
    • TRD?
    • DIRC?
    • Other?

General Information

This document describes the run plan for the Hall D Summer 2020 run.

  • Schedule for the run:
  1.  ?July 16th? - July 26th: Electron beam restoration.
  2. July 27th - ?Sept. 7th?: 6 weeks for GlueX high luminosity production.


  • Accelerator overall plan and priorities: Finish Spring run 2020 cut short by pandemic.
    • Deliver physics beam to 4 halls.
  • Hall D plan
    • Experiment: GlueX E12-06-102
    • This run period is short (6 weeks). To make the acquired data set worth analyzing: maximize production, do only crucial tests.
    • Straight track run?
    • Other special tasks?
  • Expected Staffing and responsibilities:
    • The Run Coordinator oversees the run:
      •  ?July 17th?-July 26th: ?10? days: Alexandre Deur (accelerator restoration)
      • July 27th-Aug. 5th, 10 days: Alexandre Deur
      • Aug 5th-Aug 12th, 7 days: TBD
      • Aug 12th-Aug 19th, 7 days: TBD
      • Aug 19th-Aug 26th, 7 days: TBD
      • Aug 26th-Sept. 2nd, 7 days: TBD
      • Sept 2nd-Sept ??7th??, 5 days: TBD
    • 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: Benedikt Zihlmann, Deputy PDL: Lubomir Penchev
    • The analysis coordinator (Alexander Austregesilo) oversees the off-line diagnostic of the different systems and analysis of the data.
    • Shifts: ? 1 person per shift. 4 shifts per day ?
  • 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.
      • Start of run: Daily meetings
      • Production: Alternate normal meetings (Monday/Thursday) with short meetings (Tuesday, Wednesday, Friday) ?
  • Useful links:

Runplan

  1. Verify electron beam quality and establish photon beam (assume 1 day).
    • Ion Chambers trip threshold must be set using Al. radiators
    • 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 < 0.1 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= < 0.5 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
      • 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.
    • Reestablish L1 trigger Alex. Somov. 2h).
    • Reestablish DAQ (Sergei, 2h).
    • General detector calibration (Sean Dobbs. (703-887-1776) 1h). Use 2×10-5 Al. radiator. Beam current 200nA (Solenoid magnet is off)
      • Run 15 min (solid time) in Long Mode (Mode 10)
      • Run 15 min (solid time) in Production Mode (Mode 9).
  3. ??CDC and TOF HV scans (Naomi, Beni, 6h). Use 4.5×10-4 Al. radiator (on goni). Beam current 140nA ??
  4. 47 μm diamond (JD70-105, or 106??) alignement check. (4 polarization configuration) (Hovanes. 16h?? ).
  5. GlueX-II production
    • Standard configuration: 47 μm diamond, 120-300 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). 140-360 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 [2]
    • Tagger quadrupole on
    • Harp scan (30 min): Every 2 days ??.
    • Empty target runs (2h: 1- h to empty/fill back the target, 1h running). Standard production current. After RF recovery.
  6. One "TAC" run if we have enough time (Hovanes, A. Somov 8h) Fall 2019
    • a few nA, thinest Al. radiator and ComCal.
    • To be coordinated with MCC.
    • Measure bleedthrough. If acceptable, (~nA or less), proceed with TAC-ComCal run. Otherwise, explore possibility for invasive TAC run.
    • If commissioning and analysis were successful, once a day (?), a beam envelope measurement by rastering on Act. Col. ??min
    • 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


Runplan time charts

Summer 2020 time charts:


Accelerator status

Hot Checkout

To be completed by Thurs. July. 23rd.

3% ready ; 1% checked ; 96% not ready

Readiness for Fall 2019/Spring 2020 run

  • Solenoid (Eugene/Beni):
  • Surveys (Tim/Mark/Scott)
  • DAQ (Sergei).
  • Trigger (Alex S.).
  • Beam line
    • Diamond status (Tim/Hovanes).
    • Tagger hodoscope (A. Somov).
    • Tagger microscope (Richard Jones/Beni).
    • Goniometer (Hovanes).
    • Collimator Motion (Hovanes).
    • Active collimator detectors(Richard Jones/Alexandre Deur)
    • Profiler (Hovanes)
    • Luminosity monitor (aka Active Target) (Hovanes).
    • Halo monitors (Hovanes)
    • PS system (Alex Somov)
    • Polarimeter (M. Dugger/Beni/Fernando).
    • LH2 Target (Tim/Alexandre D.)
    • TAC (Hovanes/Alex Somov).
    • Slow control (Hovanes).
    • RF (Sergei)
    • Radiation monitors (Alexandre D.)
    • x-ray W shield (Tim/Lubomir).
  • Detector systems
    • ST (Mark Ito/Beni)
    • FDC (Lubomir).
    • CDC (Beni).
    • Gas system (Beni/Lubomir)
    • BCal (Elton/Mark Dalton)
    • FCal (Mark Dalton)
    • ComCal (in lieu of TAC) (Alex Somov).
    • TOF (Mark Ito/Beni).
    • DIRC (J. Stevens).
    • GEM/TRD (Sergei/Lubomir).
    • Monitoring (Alexander Austregesilo)
  • RSAD and ESAD Safety documents (Beni):
  • Phones
  • Hall Status/safety (Mark/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.
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