Difference between revisions of "Run Coordination Meetings:Spring2025"

Revision as of 08:17, 18 March 2025

Spring 2025 Run

Google Spreadsheet. 

GlueX experiment (January 24 - July 20 2025)

GlueX Run Certificate 2025

Connect Information

To connect, please see the information on the GlueX meeting wikipage

Meeting General Agenda

Run planning meetings:

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:
  • 12 GeV
• Beam polarization expected:
  • from 5% to 73%, depending on other passes of the other Halls . No expectation of decent polarization before March 19th. Then 73% for the rest of the run.
• Solenoid:
  • 1350A
• CW Beam:
  • 250 MHz frequency.
  • Range: 1na-1000 nA.
  • Chopper slit: TBD
  • 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 02/25/25, 9 weeks shift ⇒ March. 21st - Sept. 15th ?

• 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. Needs a commissioning 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:
    • Jan. ?? - ??, ?? 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: Igal Jaegle
    • 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: Alexandre Deur
    • May 7-14, 1 week: Richard Jones
    • May 14-21, 1 week: Justin Stevens
    • May 21-28, 1 week: Boris Grube
    • 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:
    • 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. 13-20, 1 week: 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. • Cool down target (6h process) once we know that beam is imminent. V
   • Do it preferably when the target group is available for support, in case something goes wrong. V
   • [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. V
2. 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.
3. initial beam and beam line configuration that does not need to be very good but 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 with MCC whether a BLA calibration was done. If not, one should be done.
      • 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
      1. • • • 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).
   2. on Al radiator with beam (current?) have some trigger that works for the following
   3. FCAL commissioning (Sasha)
   4. ECAL commissioning (Sasha)
   5. TOF HV scan (Beni)
   6. CDC HV scan (Naomi)
   7. other detectors? (all)
   8. tagger?
4. ECal and FCal commissionings
   • Commission upgraded ECal. (A. Somov. 1 month?)
   • FCal In parallel with ECal. Needs a commissioning plan.

1. After calorimeter is "commissioned" redo the trigger setup (Sasha)
2. Diamond radiator calibration: 2 shifts? (Hovanes)
3. Photon flux optimization: 1 shift? (Hovanes)
4. TAC run-1 1.5 shifts (Sasha), requires scheduling

1. High current scan/test for GlueX III explorations, requires scheduling
2. TAC run-2 1.5 shifts (Sasha), requires scheduling
3. Straight track runs? B-Field off, requires scheduling

1. • 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. looked good
     • 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):V
     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 in or out
   • Photon flux optimization and Active Collimator calibration. (1h). V
     Call Hovanes. will postpone to duirng day time (Requires confirmation from Richard about using the Active Collimator, see step above). 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.
2. Detector and beamline checkout. V
   • microscope alignment with motor. During this, beam needs to be relatively well centered on collimator (R. Jones/(Hovanes is needed for this)) V
   • Any time before starting production (beam quality is not important, but see previous step above): microscope HV scan (2h, R. Jones) V
   • Reestablish L1 trigger (Alex. Somov. 2h). V
   • PS and TAGH HV scan. (Alex. Somov. 1h). V
   • Reestablish DAQ (Sergei, 2h). V
3. General detector calibration + HV scans (Sean Dobbs 6h [Simon's phone number in the counting room list. For Sean and Torri, they are commented out: edit this page to access them. Use 4.5×10^-4 Al. radiator (on goni). This procedure will go for the first time to 350 nA.]
4. Diamond JD70-103 alignment check (2 directions already aligned for CPP). (Hovanes. 8h). V
5. Inform MCC that they can run their procedure to set the Ion Chambers trip threshold on diamond JD70-103 .
6. GlueX-II production Ongoing
   • Standard configuration: JD70-103 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.
   • 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.
7. High-intensity program (Goal: study running scenarios up to 1 uA beam current)
   • 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
     • Scan of molybdenum, tin, tungsten and lead foil absorber downstream of the collimator. Requires several accesses and RadCon escort to install and/or remove the additional plates in the collimator cave.
   • After appropriate lower drift chamber voltages and beam currents are determined and any additional foil absorbers to be used
     • 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
8. One "TAC" run (use CCAL as TAC). Nominally in the middle or end of the run period, unless a good opportunity arises (e.g. Hall A and C not running for at least 8h).
9. Two empty target runs (One at the start of the run, the other consecutive to TAC run). Simon.
10. Straight track run (Lubomir): Tentatively at the end of the run period, sooner if the opportunity arises.
    • Overall, one night of good data.
11. Long mode 10 min run. Once a week (20 min).
12. 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.

Right after beam shutdown: From Simon's reconstruction analysis, do we need to 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
   • Bluejeans code for the daily MCC meetings and Wednesday 1:30 meeting: 569476853

Hot Checkout

To be completed by TBD

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

93% ready ; 3% checked ; 4% 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