Revision as of 08:47, 16 November 2017

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

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: 11.640 GeV (Same value as Fall 2016 and Spring 2017).
• Solenoid on at 1350A. Any field changes should be avoided if possible.
• CW Beam current:
  • Range: 1 nA-1.5 μA. 250 MHz frequency.
  • Standard production running expected at ~200 nA on 4·10^-4 R.L. radiator.
  • RSAD limit for most of the run, excluding high intensity tests: 250 nA on 4·10^-4 R.L. radiator.
• FFB on or Position Slow Lock on (FFB doesn't operate below 50nA).
• Radiators:
  • Goniometer diamond radiators:
    • J1a50       (50 μm - 4.1·10^-4 R.L., 4×4 mm²) - old crystal - excellent rocking curve
    • JD70-100 (58 μm - 4.8·10^-4 R.L., 7×7 mm²) - new crystal - excellent rocking curve
    • JD70-105 (47 μm - 3.9·10^-4 R.L., 7×7 mm²) - new crystal - good rocking curve
    • JD70-104 (17 μm - 1.4·10^-4 R.L., 7×7 mm²) - new crystal - wider rocking curve - marginally usable
  • We also have one 10 μm Al radiator.
  • 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.)

• Tagger quadrupole on (-4.2 A).

• 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 Fall 2017 and Spring 2018 run.

• Schedule for the run:

1. Nov. 27th-Dec. 1st: Electron beam restoration
2. Dec. 1st-Dec. 21st: Hall D Fall run.
3. Dec. 21st-Jan. 8th: Xmas break. (Solenoid will be ramped down but kept cool)
4. Jan. 9th-Jan. 11th: Electron beam restoration
5. Jan. 12th-Mar. 23rd: Hall D Spring run.

1. Every Tuesdays: 12h of beam study. Every Thursdays, if necessary: 8h of RF recovery.

• Accelerator overall plan and priorities:

1. Deliver physics beam to 4 halls.

• Experiment: GlueX E12-06-102 Production
• Planned tests (Accelerator, related to Hall D):
• Test nA BPM and stripline BPM.
• Test fast raster operation.
• Evaluate Rapid Access. Rapid access will be evaluated in Fall and, if successful, will be available for use in Spring. Information on Rapid Access for this run (from T. Whitlatch)
• Planned tests (Hall D):
  • Align JD70-104 (17 μm - 1.4·10-4 R.L., 7×7 mm²) (Hovanes) ? If possible in Fall 17.
  • Fast raster beam characterization (R. Jones) Will necessitate high-current (??h)
  • Beam halo measurements to assess background for PRad target TAC runs.
  • High-intensity GlueX test (S. Furletov) (??h)
  • TAC V-wire commissioning (Hovanes) (??h)
  • HV CDC and FDC scans. (L. Penchev, Beni Z.)(4h×2)
  • ToF non-linearity test. (Beni Z.) (1h×2 Separated by a few days)
  • Muon chamber test (parasitic?) (E. Smith)
  • TRD test (parasitic) (S. Furletov, L. Penchev)

• Expected Staffing and responsibilities:
  • The Run Coordinator oversees the commissioning:
    • Nov. 27th-Dec. 1st, 5 days: A. Deur (accelerator restoration)
    • Dec. 1st-Dec. 21st, 20 days: A. Deur
    • Xmas break.
    • Jan. 9th-Jan. 11th, 3 days: A. Deur (accelerator restoration)
    • Jan. 12th-Jan. 24th, 12 days: A. Deur
    • Jan. 24th-Jan. 31st, 7 days: Sasha Ostrovidov
    • Jan. 31st-Feb. 7th, 7 days: Justin Stevens
    • Feb. 7th-Feb. 14th, 7 days: TBD
    • Feb. 14th-Feb. 21st, 7 days: Alex Barnes
    • Feb. 21st-Feb. 28th, 7 days: Zisis Papandreou
    • Feb. 28th-March 7th, 8 days: Cristiano Fanelli
    • March 7th-March 14th, 7 days: Richard Jones
    • March 14th-March 22nd, 8 days: Naomi Jarvis

• • The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (T. Carstens) verify that the proper safety rules are followed. PDLs are:
    • Benedikt Zihlmann.
  • The analysis coordinator (Alexander Austregesilo) 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
    • 11.64 GeV Fall 2016
    • 11.64 GeV Spring 2017
  • 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. 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 ~ 30 mrad/hr (tagger area, gammas, on goniometer).
         • 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.
   • Establish good photon beam
   • Make sure tagger quadrupole is on (-4.2 A).
     • Insert 2*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= 15 mrad/hr (tagger area, gammas, between tagger and dump)
         • RAD102_P2= 30 mrad/hr (tagger area, gammas, on 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).
   • Once radiation levels are good, proceed with harp scans (Hovanes/Todd. 15 min)
     • Take tagger harp scans. Check consistency with Accelerator's harps. 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. (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.
     • Retract profiler.
   • Verify with MCC that position slow lock is back on (locking on Act. Col. and for values corresponding to optimal photon flux).
2. Detector and beamline checkout.
   • Reestablish L1 trigger Alex. Somov. 3h).
   • Reestablish DAQ (Sergei, 2h).
   • General detector calibration (Sean Dobbs . 4h). Use 10^-4 radiator.
     • Run 15 min in Long Mode.
   • From here on, the tasks below are interspersed with data production
3. Realign 60 μm diamond (JD70-100) Align other diamond(s) later?? (Hovanes, Paul Mattione. 12h/diamond).
4. Beam background measurements for PRad target TAC runs. (A. Deur/Hovanes/A. Somov) 10-200nA, no radiator, TAC in, target full 15 min runs?? Several runs throughout Fall/Spring run periods.
5. Straight track run (16h, nominally at the end of the Fall run. Otherwise, end of Spring run) (Lubomir)
   • Ramp down solenoid magnet (2h)
   • Take straight track run data (Lubomir)
6. Gluex data production
   • 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 scans once a day: 15 min.
   • If commissioning and analysis were successful, once a day (?), a beam envelope measurement by rastering on Act. Col. ??min
   • Empty target run every 3 week (2h: 1^- h to empty/fill back the target, 1h running). Standard production current.
   • 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.
   • TAC commissioning, systematic studies and runs. (Hovanes, Alex Somov 2 days.)
     • V-wire commissioning.
     • Move around the collimator with 1mm plug to see effect on TAC. Do 4 different positions.
     • Check effect of material on γ-beam path on TAC: for ex. fill the target (30 min to fill or empty target).
     • Do a TAC run without solenoid field to test GEANT TAC simulation in simpler conditions. (To be done around straight-track runs).
     • Concurrently with the above, 2 TAC runs (one at the beginning, one in the middle of the run). , ??h run with thick converter. 1^- LH2 target empty). Use 3.4mm collimator with 1mm plug in (if available).
   • Physics production data with diamonds and 5 mm hole. Ratio of para./transverse/45^o/135^o data:25/25/25/25. 2h runs and no more, as it may be hard to correct for calibration drifts. Switch polarization every run. Time to switch: 10min. DAQ start run overhead: 3min.
     • Luminosity:
       • Run at about 200 nA (for 60 μm diamond JD70-100).

1. Parasitic muon chamber
2. Parasitic TRD run

Hall D white board (current run plan)

Hall D counting room white board

Runplan time charts

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

Accelerator status

1. • Link to accelerator short term schedule

Hot Checkout

1. Hot Check OUT Status 10% ready ; 0% checked ; 90% not ready

Readiness for Fall 17-Spring18 run

• Solenoid (Eugene/Beni)
  • 4.5K cold and ready.
  • Tested on 10/27/17: ramped-up twice. First time, solenoid tripped. Then, successfully reached 1350A. It was then ramped-down after 2.5h at this current.

• Surveys (Tim/Tom)
  • All surveys are done.

• DAQ (Sergei).
  • Ready for Fall run.
  • Need to start testing with cosmics

• Trigger (Alex S.)
  • Will start checking boards next week (10/23 - 10/27)
  • Will start checking trigger for μ-chamber.

• Beam line
  • Diamond status (Tim/Hovanes).
    • Diamond surveyed. Small J1a50 (50 μm) was sent to U.Conn. on Oct. 1st for radiation damage study. New diamonds may be available early Dec. Will be mounted for Spring18 run.
  • Tagger hodoscope (A. Somov)
    • Will be powered and checked next week.
  • Tagger microscope (Alex B./Richard)
    • Need to do voltage check.
  • Goniometer (Hovanes).
    • Λ-wire installed.
    • Motion checked during survey. Need estimate/test/run procedure (Hovanes)
  • Collimator, Active collimator, profiler, flux monitor (Alex B./Hovanes).
    • Need test plan and simulation of data and analysis for raster beam measurement (Richard).
  • PS system (Alex S.)
    • Need to power detector for check.
  • Polarimeter (M. Dugger).
    • Outside SSD not to be connected until Summer 2018.
  • Target (Tim/Alexandre D.)
    • Target was pushed in (10/23 - 10/27). Now in position.
  • TAC (Hovanes)
    • Surveyed. In position. Need to be powered for check.
    • Need to organize special meeting to work out test plans.
  • Slow control (Hovanes).
    • Voltage control for FDC is not working. Fixed
    • One of the FDC mainframes is misbehaving.
  • RF (Elton S.)
  • Radiation monitors
• Detector systems
  • ST (Mark Ito)
    • In place. Scalers are counting.
  • FDC (Lubomir)
    • One of the mainframes is misbehaving.
    • Off for now.
  • CDC (Beni)
    • Baseline calibration done (10/21-10/28) and check channel baseline alignment. Did it also for FDV
    • No ADC F125 working spare available anymore.
  • BCal (Elton/Mark D.)
    • Testing with LED.
  • FCal (Collin)
    • Was turned on (10/9-10/13). 40 bases replaced.
    • 12 more bases need repair (10/21-10/28). Will discuss this with electronic group.
    • Dearth of spare bases.
  • TOF (Mark Ito/Beni/Alex. Ostrovidov)
    • Need to do HCO.
    • Communication problem with HV crates. 1 HV module was broken. Have to turn TOF on to see if it is fine now.
• Online monitoring (David L.)

• Calibration/reconstruction/offline monitoring (Alexander Austregesilo/Thomas B.)
  • Everything should be ready. Will run some checks.

• muon chamber (Elton S.)
  • Presently (11/02) in the EEL building and being tested there.
  • Crate is in the hall and being connected to main Hall D system.
  • Support structure is being prepared and should be ready by mid-end of Nov.

• Safety documents (Beni):
  • RSAD and ESAD ready. Will be sent to Bert
  • Question about adding rapid access to safety document.

• Hall Status/safety (Tom/Tim)
  • Rapid access is progressing and Installation should be ready for the Fall. (But read here)
  • Discussion on what training should be implemented for rapid access? Should add procedure in safety document and send a special email to Hall D collaborations asking to carefully read it.

• Other topics?
  • Moving to weekly meeting in November?