Revision as of 07:36, 25 August 2016

Meeting General Agenda

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

4.) More information on connecting to bluejeans is available. The old ESNET and SeeVough Information is archived here.

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: 11.632 GeV (include synchrotron radiation losses, except for the Hall D ramp).
• Solenoid on at 1200A ? Do we want to gather some data at different fields?). Any field changes should be avoided if possible.
• Beam current: CW 5 nA-1.5 μA. 250 MHz frequency.
• Position slow lock on or FFB on? Current and energy locks on?)
• Radiators:
  • Goniometer diamond radiators: TBD. We presently have test diamonds:
    • (J1a50 (50 μm, 4.1·10^-4 R.L.)),
    • J2a100 (100 μm 8.2·10^-4 R.L.),
    • S145-S90 (90 μm, 7.4·10^-4 R.L.) and
    • JD70-3 (80 μm, 6.6·10^-4 R.L.))
    • We also have 3 test foils (two 10 μm Al foils, and one 100 μm Al foil with a holed 10 μm Al foil pressed on it (3mm hole)).
  • Amorphous
    • 1.5 µm Al (1.7·10^-5 R.L.)
    • 10 µm Al (11.2·10^-5 R.L.)
    • 30 µm Al (33.7·10^-5 R.L.)

• Collimator hole: Both 5 mm diameter and 3.4 mm diameter. Default running: 3.4 mm?

• Target: LH2 target: cryogenic target

General Information

This document describes the run plan for the Hall D Spring 2016 run.

• Schedule for the Spring 2016 run. (Dates are according to the long term calendar.)
  1. Oct. 1st-Oct. 7th: Electron beam restoration
  2. Oct. 8th-Nov. 22nd: Hall D Fall run, part 1.
  3. Nov. 23rd-Nov. 27th: Thanksgiving break.
  4. Nov. 28th-Dec. 18th: Hall D Fall run, part 2 (includes 2 day of beam restoration).
  5. Dec. 19th-Dec. 21st: TBD
  6. Every Tuesdays: 12h of beam study. Every Thursdays, if necessary: 8h of RF recovery.
• Goals for the Fall 2016 run.

1. GlueX low luminosity data taking
2. High luminosity trigger and DAQ tests.
3. ToF checkout.

• Expected Staffing and responsibilities:
  • The Run Coordinator oversees the commissioning.
    • Oct. 1st-Oct. 7th A. Deur, if we need a RC during restoration?
    • Sat. Oct. 8th - Wed. Oct. 19th: A. Deur
    • Wed. Oct. 19th - Wed. Nov. 2nd TBD
    • Wed. Nov. 2nd - Wed. Nov. 16th TBD
    • Wed. Nov. 16th - Mon. Nov. 22ndTBD
    • Sun. Nov. 27th - Wed. Dec. 7thTBD
    • Wed. Dec. 7th - Sun. Dec. 18th TBD
    • Mon. Dec. 19th - Wed. Dec. 21st If RC necessary, TBD
  • The Physics Division Liaison (PDL, Benedikt Zihlmann) and Hall D Work Coordinator/Safety Warden (T. Carstens) verify that the proper safety rules are followed.
  • Shifts: 2 persons per shift.
• 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.
  • Daily run meetings broadcasted on Bluejeans will occur at 8:45am in the counting house conference room. The Run Coordinator will be responsible for organizing and chairing the meeting.
• Useful links:
  • Accelerator schedule
    • long term calendar
    • Scheduled Accelerator Down (SAD)/Maintenance Calendar
    • http://accboard.acc.jlab.org/
  • Links to previous runplans
    • 10.5 GeV Fall 2014
    • 6 GeV spring 2015
    • 12.05 GeV Fall 2015
    • 12.05 GeV Spring 2016
  • 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. Re-establish electron and photon beams (assume 3 days).

1. Detector and beamline checkout.
   • ToF tests (Benedikt Zihlmann).
2. Realign old diamonds. Align new Diamonds. (Hovanes, Paul Mattione, Ken Livingston?).

• Systematic studies needed? e.g. run a different coherent peak position?)

1. L1 trigger test for high-rate performance tests (Alex Somov. 8h+8h. Use up to 1 μA. DC off if necessary)

• Check rates for various beam currents and thr. settings.

1. L3 high-rate performance tests (David Lawrence)
2. DAQ high-rate performance tests (Sergei Furletov)
3. Gluex data production
4. *quadrupole off?)

• Empty target run every ?? (5h: 1h to empty/fill back the target, 2h running)). Standard production current or highest possible or both? )
• Amorphous run Every day? 1h? Standard production current?). Time to switch from pol. to unpol.: 10min. time to switch from unpol. to pol.: 30min.
• TAC runs every ?? )(Hovanes, Alex Somov, 2h? :1^+ h run, 1^- h target empty+fill))
• Physics production data with diamonds and 5 mm hole. Ratio of para./transverse data:50/50. 1h runs? Switch every 2 runs. Time to switch: 10min.

Hall D white board (current run plan)

Runplan time charts

Runplan time charts (readjusted after CHL repair started on March 9th)

Commissioning time chart adjusted for the CHL repairs. Time t=0 corresponds to 03/27/2016. The horizontal scale is the time during which beam is available (in other word, it would be the real time with 100% of beam efficiency). The task time estimates given on the plot have 100% contingency.

Accelerator status

1. • Link to accelerator short term schedule
   • Accelerator schedule through June 2017.

Hot Checkout

1. Hot Check OUT Status 100% ready ; 0% checked ; 0% not ready

Discussion on performances and problems during the Fall 15 run. Subsystem preparations and goals for the Spring 16 run

Summary of the Fall 15 run, with details on subsystem performances

• Solenoid (Eugene/Beni)

• DAQSurveys
  • Polarimeters

• DAQ (Sergei)
  • DAQ is ready.

• Trigger (Alex S.)

• Beam line
  • Collimator plug (Richard J./Tim). Goal: reduce photon flux by factor ~10. Proposed characteristics: Tungsten, 7.5 cm long, 1.05mm ID (.041 inches) +/- 0.05mm. Timeframe to machine: about 2 weeks. Document summarizing the simulation study from Richard. J.
  • Tagger hodoscope (Nathan/Franz)
    • Obtained good data from voltage scan done during Fall 15 run. Can now use lower UV.
    • As of Jan. 13th, 5 counters do not work. They will be replaced on Feb. 1st.
  • Tagger microscope (Alex B./Richard)
    • Fall 15 data allowed to optimized bias voltage. Know thresholds of ADC and discrim. As of of Jan. 13th, need to re-solder 5-6 SiPM. Otherwise, it is ready.
  • Tagger quadrupole tested. Other magnets tested as well.
  • Goniometer (Hovanes)
  • Active collimator, profiler, flux monitor (Alex B./Hovanes)
  • PS system (Alex S.)
    • 5 channels are still not working. The will be fixed after the end of the Spring 16 run.
    • Threshold adjustment needed for high granularity counter.
    • Need to calibrate Hall probe (done on Jan. 14th)
  • TRD (Sergei, Lubomir)
    • Small leak on gas line. Will fix it before we start.
    • Note for planning: when Xe starts to be used, need to take data (concurrent with main Hall D/GlueX commissioning) within 2-3 days.
  • Polarimeter (M. Dugger/N. Sparks)
    • Adding filtering electronics. It works well.
  • Target (Alexandre D.)
    • Target is ready and pushed in.
  • TAC (Hovanes)
    • Cabled and surveyed.
    • Motion and signals checked.
    • Need to wait for tagger trigger to work well before to make TAC plans.
  • Slow control (Hovanes)
    • Slow controls are ready

• Detector systems
  • ST (Mahmoud)
    • ST is ready. HCO done.
    • Tim is designing a mechanism to avoid HV cables to be pulled off when the target is moved.
    • When bias voltage are changed, all other running condition should be maintained to insure meaningful comparison.
  • FDC (Lubomir)
    • FDC are ready.
    • Some issues with HV channels related to low Hall humidity
    • No straight track data necessary, unless an opportunity arises. Will then take 4h of data.
  • CDC (Beni). Ready
  • FCal (Adesh)
    • May need to replace 2-3 bases.
    • EPICS GUI not working -> cannot test FCal. Fixed now. Able to take pulser data.
    • 12 channels have HV problems. 20 channels were not reported because they were not reconnected or FADC not working or PMT base not working.
  • Bcal (Elton)
    • Bcal chiller temperature was lower to 5 degree C.
  • TOF (Alex. Ostrovidov) cosmic run done. Ready for run.

• Online monitoring (David L.)

• Trigger level 3 (David L.)

• Physics data taking (Justin S.)

• RC duty:
  • Thur. February 4th to Wed. March 14th: Alexandre Deur
  • Wed. March 15th - Fri. March 29th: Mark Ito
  • Fri. March 30th - Wed. April 13th: David Lawrence

• Other topics

Meeting Notes

• April 19-April 25
• April 11-April 18
• April 3-April 10
• March 27-April 2
• March 20-26
• March 13-19