Revision as of 08:18, 1 September 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 1350A. Any field changes should be avoided if possible.
• Beam current: CW 1 nA-1.5 μA. 250 MHz frequency. Entire run at same RF?
• FFB on or Position slow lock on (FFB doesn't operate below 50nA). 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)).
  • We expect to have four additional diamonds, all 7mm by 7mm
    • 20 micron
    • 20 micron
    • 50 micron
    • 50 micron
  • 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: 5.0 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.
    • Sat. Oct. 1 - Fir. Oct. 7 (7 days): Alexandre Deur (accelerator restoration)
    • Sat. Oct. 8 - Wed. Oct. 19 (11 days): Alexandre Deur
    • Wed. Oct. 19 - Wed. Nov. 2 (14 days): Mark Dalton
    • Wed. Nov. 2 - Wed. Nov. 16 (14 days): Paul Eugenio
    • Wed. Nov. 16 - Wed. Nov. 23: (7 days): Naomi Jarvis
    • Wed. Nov. 23 - Sun. Nov. 27: (4 days): Thanksgiving shutdown: very likely RC not necessary
    • Sun. Nov. 27 - Wed. Dec. 7: (10 days): Adesh Subedi
    • Wed. Dec. 7 - Mon. Dec. 19: (12 days): David Lawrence
    • Mon. Dec. 19 - Wed. Dec. 21: (2 days): 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.
  • The analysis coordinator (Paul Mattione) oversees the off-line diagnostic of the different systems and analysis of the data.
  • 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).
   • Ion Chambers trip threshold must be set.
   • Tune electron beam with radiator retracted
     • Amorphous Radiator (and diamond) must be retracted. Collimator should be in blocking position. CDC/FDC are off
     • Radiation levels should be closely monitored by MCC crew.
       • Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 50 nA)
         • RAD102_P1 ~ 3 mrad/hr (tagger area, gammas, between tagger and dump)
         • RAD102_P2 ~ 15 mrad/hr (tagger area, gammas, near electronics racks).
         • RAD102_P3 ~ 0.1 mrem/hr (tagger area, neutrons, near electronics racks)
         • RAD508_P1 < 0.1 mrad/hr (collimator cave, gammas).
         • RAD508_P2 < 0. mrad/hr (Hall. Neutrons).
     • Hall D tagger CARMS, Ion Chamber and BLM threshold for beam trips should not be changed without approval of Hall D leader.
   • Check bleedthrough level
   • Establish good photon beam
     • Insert 10^-5 RL radiator. (Call MCC and ask to mask the FSD each time the radiator is moved)
       • Typical levels are (for 2*10^-5 radiator, electron beam current 50 nA)
         • RAD102_P1= 2-10 mrad/hr (tagger area, gammas, between tagger and dump)
         • RAD102_P2= 40-50 mrad/hr (tagger area, gammas, near electronics racks)
         • 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).
   • Once radiation levels are good, proceed with harp scans (Hovanes)
     • Take tagger harp scans. Check consistency with Accelerator's haprs. Study beam focusing
   • 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
   • Active Collimator calibration.
     • re-Insert the 2*10^-5 radiator (Call MCC).
     • Determine maximum photon beam transmission by doing 2D scans (x: beam scan, y: beam scan. ±5mm with 0.5mm steps should we do instead x/y scans using the collimator x/y motions?). Stay 5 seconds with stable beam for each steps Remind MCC that they should use only the last corrector (5C11A) to adjust the beam position. If the adjustment results in unacceptable e- beam position in the tagger dump, remind MCC that they should use the tagger magnet only to readjust the e- beam position in the tagger dump.Meanwhile, monitor the rate at the active target and rates (including coinc.) in the pair spectrometer.
     • Record on the white board what is the profiler position corresponding to the center of the A.C.
   • Verify with MCC that current/position/energy locks are on, if possible.

1. Detector and beamline checkout.
   • ToF tests (Benedikt Zihlmann. 6h).
   • L1 trigger tuning. Check new firmware (Alex. Somov. 8h)
   • PS magnetic field scans. (Alex. Somov. ??h)
2. Realign old 50 μm diamond. Align at least 2 new Diamonds. (Hovanes, Paul Mattione, Ken Livingston?. 12h/diamond. At least 36h).
   • Systematic studies needed? e.g. run a different coherent peak position?
3. 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.
4. Run PS at lower B-field so that the TPol can check the low photon energy tail polarization (Alex Somov/Nathan Sparks/Mike Dugger font color="red">parasitic?)
5. DAQ high-rate performance tests (Sergei Furletov ??h)
6. L3 high-rate performance tests (David Lawrence ??h)
7. Gluex data production
8. *quadrupole off?)
   • Empty target run every week (5h: 1h to empty/fill back the target, 1h running). Standard production current.
   • 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. 2 TAC runs (one at the beginning, one in the middle of the run). (Hovanes, Alex Somov, 5h: 4h run with thick converter. 1h target empty+fill)
   • Physics production data with diamonds and 5 mm hole. Ratio of para./transverse data:50/50. 2h runs Switch polarization every run. Time to switch: 10min. DAQ start run overhead: 3min.
     • Trigger configuration?)

Hall D white board (current run plan)

Hall D counting room white board

Runplan time charts

To come.)

• View Runplan google calendar
• Edit Runplan google calendar
• MCC white board
• Spreadsheet: number of triggers

Accelerator status

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

Hot Checkout

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

Readiness for Fall 16 run

• Solenoid (Eugene/Beni)
  • Check with Spring16 data that running at 1350A vs 1200A is beneficial (Paul Mattione/Mike/Alex)

• Surveys (Tim/Tom)

• DAQ (Sergei)

• Trigger (Alex S.)

• Beam line
  • Tagger hodoscope (Nathan/Franz)
  • Tagger microscope (Alex B./Richard)
  • Goniometer (Hovanes)
  • Active collimator, profiler, flux monitor (Alex B./Hovanes)
  • PS system (Alex S.)
  • Polarimeter (M. Dugger/Nathan)
  • Target (Alexandre D.)
  • TAC (Hovanes)
  • Slow control (Hovanes)
  • RF (Paul Mattione)

• Detector systems
  • ST (Mark Ito)
  • FDC (Lubomir)
  • CDC (Beni)
  • Bcal (Elton)
  • Fcal (Adesh)
  • TOF (Mark Ito/Beni/Alex. Ostrovidov)
• Online monitoring (David L.)
• Calibration/reconstruction/offline monitoring (Paul Mattione)

• Level 3 Trigger (David L.)

• Other topics?