Difference between revisions of "Run Coordination Meetings:Spring2025"

Latest revision as of 23:28, 5 April 2025

Spring 2025 Run

Google Spreadsheet. 

GlueX experiment (January 24 - July 20 2025)

GlueX Run Certificate 2025

Connect Information

• To connect to this meeting, please see the information on the GlueX meeting wikipage
• Connection to Shift in Counting House: List of Links

Meeting General Agenda

Run planning meetings:

• Run Planning Meeting Notes, April 3 - April 9, 2025

Beam and Hall configuration

• Commissioning of ECal.
  • Other task that can be done if there are pauses in the ECal commissioning: see General_Information
• Commissioning of FCal.
• Experiment: GlueX-II/JEF.
• Beam energy expected:
  • 11.733 GeV (this accounts for synchrotron radiation).
• Beam polarization expected:
  • from 5% to 73%, depending on other passes of the other Halls . No expectation of decent polarization before (March 19th + runstart delay). Then 73% for the rest of the run.
• Solenoid:
  • 1350A
• CW Beam:
  • 250 MHz frequency.
  • Range: 1na-1000 nA.
  • Chopper slit: C (as of 03/29/2025)
  • Standard current and radiators
    • 300 nA on a 4.1·10^-4 R.L. radiator (50 μm diamond). (RSAD limit 400nA on 58 μm diamond))
    • 300 on a 33.7·10^-5 R.L. AL radiator (30 µm Al). (RSAD limit 480nA on 30 µm Al radiator))
• Position Slow Lock on or FFB on (FFB doesn't operate below 50nA).
• Radiators:
  • Goniometer radiators: Start with JD70-107. Next, JD70-109. JD70-103 may still be usable if needed.
    • Diamond JD70-107 (55 μm - 4.6·10^-4 R.L., 7×7 mm²) New crystal. (Not expected to be great according to rocking curve.)
    • Diamond JD70-109 (50 μm - 4.1·10^-4 R.L., 7×7 mm² - New crystal - (Not expected to be good according to rocking curve.)
    • Diamond JD70-103 (50 μm - 4.1·10^-4 R.L., 7×7 mm²) Used in CPP. Partly spent.
    • (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. Did not display sharp coherent peak.)
    • (Diamond JD80-212 (80 μm - 6.6·10^-4 R.L., 8×8 mm²) - To be tested.)
    • (Diamond JD80-213 (80 μm - 6.6·10^-4 R.L., 8×8 mm²) - To be tested.)
    • Amorphous 40 μm Al radiator (44.9·10^-5 R.L.)
    • Amorphous 1.86·10^-5 R.L., (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.

• Targets:
  • LH2 target: cryogenic target

• TPol converter: 75 μm

• Miscellaneous:
  • PS test area. Tests must be fully opportunistic,without interfering with ECal commissioning and GlueX data taking. No more than 3 persons involved in such tests should be in the Hall during a control access:
    • Presentations this Friday (01/17/2025):
      • Future plans for tests - Tanja Horn/Yulia Furletova
      • AC-LGAD (Low Gain Avalanche Diode) silicone strip detector setup - Zhenyu Ye
      • ZDC (zero degree calorimeter) SiPM-on-Tile setup - Miguel Arratia

General Information

This document describes the run plan for the Hall D Spring 2025 run.

• Schedule for the run (see 2025 official schedule (draft)):

1. February or March TBD: Electron beam restoration.
2. January 24th - July 20th: 26 weeks for upgraded ECal commissioning and GlueX-II/JEF. As of 03/28/25, the schedule is now March. 26st - Aug. 18th (~20 weeks of running)

• Accelerator overall plan and priorities: Deliver physics beam to 4 halls

• Hall D plan summary:
  • Beam and detector check-out: 50 - 300 nA. ~ a day.
    • Commission new beam profiler from Regina (Hovanes).
  • Commission of ECal (~ a month. 150 nA)
    • Opportunistic tests during possible pauses of ECAL Commissioning:
      • Diamond alignment (Hovanes, see below)
      • CDC HV scans (Beni, Naomi). Need compatible trigger
      • ToF HV scans (Beni). Need compatible trigger
      • Lead glass HV scans (Malte). Need compatible trigger
      • Study thick 80μm new diamond (Richard).
      • Others?
  • Commissioning of FCal (In parallel with ECal.) Comissioning Plan
  • Diamond alignment: Stable beam (no frequent trip) 20 nA without FSD for 2-3 shifts.
  • Experiment: GlueX-II/JEF E12-12-002
  • 2 TAC runs. ~nA or less. The bleedthrough should be small compare to it. 1 run just after ECAL Commissioning. Another near the end of the run.
    • Ideally, TAC run should be done with the other Halls off.
    • If not possible, the next best option is to have both A and C not at 5 passes, so that magnetic extraction is performed (less bleedthrough than with RF separation).
      • Either Hall A or C or both are at 5 passes during the whole run ⇒ we will have to watch for opportunity when the Hall at 5 passes is down.
  • High luminosity runs: up to 1 week at 650nA, and up to 1 day at 1 uA.
  • 2 empty target runs (300 nA). 1 run at the start of GlueX-II data taking. Another near the end of the run.
  • Straight track run: 2 shifts (50% efficiency: one shift of good data) (50 nA on 10^-4 R.L. radiator).
  • Opportunistic tests:
    • GEM-TRD test during ECAL Commissioning Positioned 3 to 6 o'clock in front of forward detectors, looking downstream.

• Expected Staffing and responsibilities:
  • The Run Coordinator oversees the run:
    •  ?? - ??, ?? days (beam restoration): Alexandre Deur
    • Jan. 24 - 29, 6 days: Alexandre Deur
    • Jan. 29 - Feb. 5, 1 week: Igal Jaegle
    • Feb. 5-12, 1 week: Simon Taylor
    • Feb. 12-19, 1 week: Edmundo Barriga
    • Feb. 19-26, 1 week: Colin Gleason
    • Feb. 26-March 5, 1 week: Igal Jaegle
    • March 1-5 5 days: Alexandre Deur
    • March 5-12, 1 week: Simon Taylor
    • March 12-19, 1 week: Igal Jaegle
    • March 19-26, 1 week: Alexandre Deur
    • March 26-Apr. 2, 1 week: Alexandre Deur
    • Apr. 2-9, 1 week: Naomi Jarvis
    • Apr. 9-16, 1 week: Mark Dalton
    • Apr. 16-23, 1 week: Hao Li
    • Apr. 23-30, 1 week: Mike McCaughan
    • Apr. 30-May 7, 1 week: Igal Jaegle
    • May 7-14, 1 week: Boris Grube
    • May 14-21, 1 week: Justin Stevens
    • May 21-28, 1 week: Richard Jones
    • May 28-June 4, 1 week: Amy Schertz
    • June 4-11, 1 week: Edmundo Barriga
    • June 11-18, 1 week: Naomi Jarvis
    • June 18-25, 1 week: Drew Smith
    • June 25-July 2, 1 week: Hao Li
    • July 2-9, 1 week: Simon Taylor
    • July 9-16, 1 week: Drew Smith
    • July 16-23, 1 week: Mark Dalton
    • July 23-30, 1 week: Alexandre Deur
    • July 30-Aug. 6, 1 week: Mike McCaughan
    • Aug. 6-13, 1 week: Colin Gleason
    • Aug. 13-18, 6 days: Simon Taylor
    • Aug. 20-27, 1 week: Edmundo Barriga
    • Aug. 27-Sept. 3, 1 week: Boris Grube
    • Sept.3-10, 1 week: Drew Smith
    • Sept.10-15, 6 days: Igal Jaegle

• 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 leader and 1 worker, both on-site, 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.

• Useful links:
  • Accelerator schedule and information
    • Long term schedule
    • Scheduled Accelerator Down (SAD)/Maintenance Calendar
    • http://accboard.acc.jlab.org/
    • PD weekly summary (also available from Accelerator's ELOG)
    • RC weekly summary report page
  • Link to Richard Jones program to plot the beam profile at the collimator.
    • Harp extrapolation tool
  • Links to previous runplans
  • Web-accessible EPICS information
    • Hall D EPICS summary screen from CSS
    • Accelerator summary screen from CSS
    • Hall D detectors related EPICS screens
    • Hall D related accelerator screens epicsweb page
  • Links to beam parameters/radiation level monitoring:
    • Last 8-hours plots showing 1-minute, 10-minute, and hourly averages
    • Same but Last 24-hours
    • Same but Last 72-hours
    • Week, month, and quarter (3 months) plots also exist, with similar web addresses.
    • A map of the radiation monitors

Runplan

1. Ramp-up Solenoid (~8h process) once we know that beam is imminent. V
2. Cool down target (6h process) once we know that beam is imminent.
   • Do it preferably when the target group is available for support, in case something goes wrong.
   • [https://halldweb.jlab.org/hdops/wiki/index.php/Cryogenic_Target_Shift#Routine_Operation To cool down, use "empty" button, so that the target cell remains empty and there is no need to man the counting room.
3. Make sure all radiators (from goni and amorphous ladder) are retracted. ACol in blocking position. Profiler retracted. Check that magnets are at their nominal fields.
4. initial beam and beam line configuration. It does not need to be optimal for ECal/FCal commissionning. We require acceptable rad levels in the tagger hall and reasonable photon flux onto the LH target.
   1. Verify electron beam quality and establish photon beam (assume 1 day).
      • Ion Chambers trip threshold must be set using the 4 Al. radiators (1 on goni, 3 on amorphous radiator ladder) Wait with diamond until after alignment
      • Hall D BCM calibration: Check status of BCM calibration constant (Alexandre) and decide if actions are needed (See here for a report on the BCM calibration problem)
      • 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).
      1. • Commission new beam profiler from Regina (Hovanes). (Back-up plan in case of serious problem: re-install old profiler)
         • 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 (for future reference).
        • If not the case yet, 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.
        • Log the harp results in HDlog for future analysis: whenever convenient, Hovanes will check them to assess the photon beam convergence so that we have some idea of where we are. (Good beam convergence is not necessary until data production on diamond.)
        • Insert profiler (no need for masking FSD when an object is inserted in the photon line), run with 1×10^-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. Keep monitoring this position; produce a strip chart and log it.
      • Radiation level study (1h): if you feel up to the task, strip chart the five radiation monitors (see above) and log them.
        • 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 no 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
      • Inform Richard Jones that we are getting ready to use the Active Collimator, and ask him if he needs to check the Active Collimator with the beam. Ask richard whether profiler should be in or out
      • Photon flux optimization and Active Collimator calibration. (Hovanes, ~1h). (Requires confirmation from Richard about using the Active Collimator, see step above). This task should be scheduled between 8a and 8pm, as optimal transmission (i.e beam center where polarization is highest is aligned on the collimator hole) is not crucial until data production on diamond. The following steps will be done by Hovanes; solenoid should be on to protect FDC & CDC b/c collimator will be moved to 5 mm hole
        • 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.
5. Detector and beamline checkout.
   • Microscope alignment with motor. During this, beam needs to be relatively well centered on collimator (R. Jones)
   • Any time before starting production (beam quality is not important, but see previous step above): microscope HV scan (2h, R. Jones)
   • General detector calibration + HV scans (Sean Dobbs ) 6h. Use 4.5×10^-4 Al. radiator (on goni). This procedure will go for the first time to nominal current 300 nA. CDC HV scan (Naomi) needs BCal trigger only (and stable weather). Some FDC HV scans (Lubomir) can be tried with BCal trigger only, but may need FCal or Ecal. Sean needs 15-30 mins of raw mode data and 1-2h of short mode data at 300nA with nominal detector settings. **instructions are here**
6. ECal and FCal commissionings (~1 month. Alex Somov, Malte)
   • Commission upgraded ECal. (A. Somov. 1 month?)
   • FCal In parallel with ECal. Needs a commissioning plan.
   • Other tasks to be done opportunistically during nights and possible pauses of ECAL commissioning:
     • Diamond alignment(s) (Hovanes)
   • PS and TAGH HV scan. (Alex. Somov. 1h).
     • CDC and FDC HV scans (Naomi, Lubomir)
     • ToF HV scans (Beni)
     • Photon flux optimization if not done yet (Hovanes)
     • Study thick 80μm new diamonds (JD80-212 and JD80-213)
     • Take test production data (during the night)
7. If photon flux is not optimal yet (see above), optimization is to be done here.
8. After calorimeter is commissioned, redo the trigger setup (Alex Somov)
9. Diamond radiator alignments (unless already done opportunistically during ECal/FCal commissioning): ~2 shifts? (Hovanes)
   • Question to spokespersons: where should the coherent edge sits on the microscope, given the electron beam energy?
   • Diamond JD70-107 alignment (Hovanes. 12h-16h). Depending on how JD70-107 performs, Hovanes will decide if he needs to do align/check JD70-109/JD-80-212/JD80-213.
10. Inform MCC that they can run their procedure to set the Ion Chambers trip threshold on diamond JD70-107
11. TAC run-1, sometimes at the start of GlueX-II production. 1.5 shifts (Alex Somov). Requires scheduling with MCC and other Halls.
12. Empty target run-1, sometimes at the start of GlueX-II production. (2h: 1^- h to empty/fill back the target, 1h running). 300 nA. To be done after TAC run, beam study or RF recovery. (Simon)
13. GlueX-II production
    • Standard configuration: JD70-107 diamond, 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 9 sets of runs: 2 runs 0^o, then 2 runs 90^o, then 2 runs 45^o, then 2 runs 135^o, then 1 amorphous (goniometer) run.
      • Amorphous runs: 4.5×10^-4 Al. radiator (on goni). 300nA. Use the amo run to rejuvenate the amo reference in CBREM GUI, every cycle.
    • Do not attempt to save time by pre-starting the run and wait for beam to return. See why here
    • 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, or after significant beam interruptions requiring beam retuning, or beam down for >24h.
    • Long-mode run, 10 min, once a week. (20 min).
14. Sometimes when opportunity arise or when it decided it is time: Diamonds JD70-109/JD-80-212/JD80-213 test/alignment (Hovanes. 12h-16h).
15. Inform MCC that they can run their procedure to set the Ion Chambers trip threshold on diamond JD70-109
16. High current scan/test for GlueX III explorations. Up to 1 week at 650nA, and up to 1 day at 1 uA. (Justin?)
    • Requires scheduling.
    • Needs a detailed plan. Placeholder plan:
      • Short intensity scans from 300 nA - 1 uA for ~1/2 shift, soon after production is established
        • Observe drift chamber currents and scaler rates and record EPICs data
        • Detector requirements: TOF, TAGH and DIRC HV off, current limits for CDC and FDC provided by Naomi and Lubomir
        • 2 shifts of production running with full detector to measure yields of rho/omega
        • Production data with currents ranging from 250 nA - 1 uA using prescaled FCAL-BCAL trigger
        • Production data with higher FCAL-BCAL thresholds to remove prescale and find any other bottlenecks for running with 1 uA
17. TAC run-2 1.5 shifts (Alex Somov), requires scheduling
18. Empty target run-2 (2h: 1^- h to empty/fill back the target, 1h running). 300 nA or whatever is the standard production current. To be done after TAC run, beam study or RF recovery. Simon
19. Straight track runs. B-Field off, 2 shifts. (Lubomir). Tentatively at the end of the run period, sooner if the opportunity arises.
    • Overall, one night of good data.

Right after beam shutdown:

• do a resurvey the Start Counter once the target cart is pulled out.
• Any other after-run survey required?

Hall D situation room (current run plan)

Hall D counting room white board

Accelerator status

1. • Link to accelerator short term schedule (White board)
   • Link to accelerator SAD calendar
   • The Zoom code for the daily MCC meetings and Wednesday 1:30 meeting can be found here

Hot Checkout

To be completed by TBD

• Hot Check OUT Status ( Hot Check OUT Status (off site test version))

97% ready ; 2% checked ; 1% not ready

Readiness of subsystems for Spring 2025 run

(This section is commented out for clarity)

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.

• Beni will contact Walt Akers to inquire about their status. Done. Walt will take care of it.

Running Shifts Remote

• Remote shift concepts