Difference between revisions of "Run Coordination Meetings:Spring2019 Run"

Revision as of 09:26, 25 January 2019

Spring 2019 GlueX Run

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

Information in blue is specifically for the DIRC commissioning

Information in magenta is specifically for the PrimEx-η run

• Beam energy expected:
  • 11.630 GeV (10 MeV less than value for Fall 2016 to Fall 2018 up Nov. 15th, due to imbalanced linac setting).
• Solenoid:
  • DIRC commissioning: 1350A
  • PrimEx-η run: off
• CW Beam:
  • 250 MHz frequency.
  • Range:
    • DIRC commissioning: 50 nA-1.2 μA.
    • PrimEx-η run: 1 nA-500 nA.
  • Chopper slit: shared with Hall C until 03/10/2019. Then alone on slit A.
  • Standard current and radiators
    • DIRC: Standard commissioning current: 225 nA on 1.4·10^-4 R.L. radiator (JD70-104 17 μm diamond).
    • DIRC: Hight intensity tests: 5 days at 1.2 μA on 1.4·10^-4 R.L. radiator (JD70-104 17 μm diamond) (or 0.5 μA on JD70-105, 47 μm diamond of 3.9·10^-4 R.L.)
    • PrimEx-η run: Standard production on ⁴He: 320 nA. on 10 µm Al (11.2·10^-5 R.L.)
    • PrimEx-η run: Standard production on Be: 100 nA. on 10 µm Al (11.2·10^-5 R.L.)
  • RSAD limit for most of the run, excluding high intensity tests: 1.3 μA on ·10^-4 R.L. radiator for 5 days.
• Position Slow Lock on or FFB on (FFB doesn't operate below 50nA).
• Radiators:
  • Goniometer radiators:
    • Diamond JD70-104 (17 μm - 1.4·10^-4 R.L., 7×7 mm²) - wider rocking curve - Tested in Spring 2018 and used at the beginning of Fall 2018. Probably has some radiation degradation.
    • Diamond JD70-105 (47 μm - 3.9·10^-4 R.L., 7×7 mm²) - Used for the second part of GlueX's Fall 2018 run. Good performance.
  • 40 μm Al radiator (44.9·10^-5 R.L.)
  • V-wire (for TAC run).
  • Amorphous
    • 1.64 µm Al (1.86·10^-5 R.L., see study)</font>
    • 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.

• Targets:
  • LH2 target: cryogenic target
  • ⁴He target: cryogenic target
  • Be target 18 mm, 5·10^-4 R.L. </font>

• Miscellaneous:
  • CPP (Charged pion polarizability) shielding will be temporary installed.
  • Transition Radiation Detector in the Hall (Parasitic runs)

General Information

This document describes the run plan for the Hall D Spring 2019 run.

• Schedule for the run:

1. Jan. 22nd - 29th: Electron beam restoration
2. Jan. 30th - Feb. 12th: 2-weeks DIRC Commissioning (Solenoid at nominal field. LH2 target))
3. Feb. 12th: 1 day of CPP test?? (Solenoid at nominal field. LH2 target))
4. Feb. 12th - Apr. 7th: 8.5-weeks PrimEx-eta run (Solenoid off. "empty Be" (no target, only the rohacell frame is present), then Be then ⁴He target ).

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

• Accelerator overall plan and priorities:

1. Deliver physics beam to 4 halls. (Hall A stop early, on March. 10th. Halls B and or C will always be at 5th pass, so Hall D beam will always be RF-separated.)

• DIRC commissioning page
• PrimeX run plan
• DAQ and Trigger high-intensity tests during DIRC commissioning.
• CPP tests during last day of DIRC commissioning?
• Parasitic TRD runs.
• If opportunity arises, test fast raster beam envelope measurement with larger x-rastering (Richard Jones)
• Strait track runs not expected to be needed

• Expected Staffing and responsibilities:
  • The Run Coordinator oversees the commissioning:
    • Jan. 22nd-Jan. 29th, 7 days: Alexandre Deur (accelerator restoration)
    • Jan. 30th-Feb. 13th, 14 days: Alexandre Deur
    • Feb. 13th-Feb. 20th, 7 days: Colin Gleason
    • Feb. 20th-Feb. 27th, 7 days: Sean Dobbs
    • Feb. 27th-March 6th, 7 days: Justin Stevens
    • March 6th-March 13th, 7 days: Alexander Austregesilo
    • March 13th-March 20th, 7 days: TBD
    • March 20th-March 27th, 7 days: Richard Jones
    • March 27th-Apr. 3rd, 7 days: TBD
    • Apr. 3rd-Apr. 7th, 4 days: TBD
  • The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (M. Stevens) verify that the proper safety rules are followed. PDL is:
    • Lubomir Penchev
  • 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 schedule
    • Scheduled Accelerator Down (SAD)/Maintenance Calendar
    • http://accboard.acc.jlab.org/
  • Link to Richard Jones program to plot the beam profile at the collimator.
    • Harp extrapolation tool
  • 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
    • 11.64 GeV Fall 2017 and Spring 2018 runs
    • 11.64 GeV Fall 2018
  • 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 < 0.1 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
       • 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= < 0.5 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 (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.
     • Insert profiler (no need for masking FSD when an object is inserted in the photon line), run with 10×10^-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.
   • 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
   • PS detector threshold scan. (A. Somov, 1h)
   • Microscope yield study (row-by-row scan). (Richard Jones/Jim McIntyre, 1h)
     • Call Richard Jones 20 min before the start of this task. Call Alex Somov to set-up the PS trigger.
     • Insert 5mm collimator.
     • Procedure to follow
     • Any type of beam quality will do.
     • 10^-4 radiator, 10^-3 convertor, 80 nA beam current.
   • Photon flux optimization and 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.
     • 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.
   • Reestablish L1 trigger Alex. Somov. 2h).
   • Reestablish DAQ (Sergei, 2h).
   • General detector calibration (Sean Dobbs. 1h). Use 10^-4 radiator.
     • Run 15 min (solid time) in Long Mode (Mode 10)
     • Long mode (Mode 10) w/ FCAL LED on 1-10Khz (Mark D.)
     • Run 15 min (solid time) in Production Mode (Mode 9).
3. Check 17 μm diamond (JD70-104) alignement. (We expect to use 2 polarization configuration only) (Hovanes. 1h).
4. DIRC commissioning
   • DIRC commissioning page
   • Standard configuration: 17 μm diamond, 225 nA (1.2 μA for high intensity run), 5 mm hole, TPol used? 75 μm TPol convertor??. 2h runs and no more, as it may be hard to correct for calibration drifts</font>. DAQ start run overhead: 3min.
   • Amorphous runs. Only for luminosity scans. 50-300 nA. Use 10 µm Al (1.12·10^-4 R.L.), on amorphous radiator ladder.
   • Tagger quadrupole on
   • Harp scan (30 min): Only once in the middle of the DIRC commissioning (beside the ones done during beam set-up).
   • One Empty target run (2h: 1^- h to empty/fill back the target, 1h running). Standard production current.
   • Long mode 10 min run. Twice or Thrice a week. Beam must be off. On opportunistic basis if possible (Purpose: monitor neutron radiation damage to ST due to nuclear target higher neutron yield.)
   • No TAC run necessary
5. Transition to PrimEx-η

• CPP (Charged pion polarizability) tests (Not firm yet.)
  • To be set-up and done during the last day of DIRC allocated commissioning time.
  • Use LH2 target, keep solenoid on at nominal field, DIRC stays in nominal position.
  • Move downstream platform downstream
  • Install passive shielding in front of TOF.
  • Set-up and check specific CPP trigger: 2h (Alex Somov).
  • Tests (to be done at various positions of passive shielding).
  • End of test: remove shielding, ramp down solenoid.

1. PrimEx-η
   • PrimEx-η runplan page
   • Standard configuration: 10 µm Al (11.2·10^-5 R.L. Beam current depends on target. 2h runs and no more, as it may be hard to correct for calibration drifts</font>. DAQ start run overhead: 3min.
   • Two TAC runs (to be done with the TAC detector, not with ComCal).
     • First one: shortly after March 10th, once we Hall A is down and we run on the Hall A slit.
     • Second one: near the end of the run.
     • HARP scan (only Hall D harp): 10 min. Every two days.
   • Long mode 10 min run. Twice or Thrice a week. Beam must be off. On opportunistic basis if possible (Purpose: monitor neutron radiation damage to ST due to nuclear target higher neutron yield.)

Hall D situation room (current run plan)

Hall D counting room white board

Runplan time charts

Accelerator status

1. • Link to accelerator short term schedule

Hot Checkout

1. Hot Check OUT Status 7% ready ; 12% checked ; 81% not ready

Readiness for Spring 19 run

• Solenoid (Eugene/Beni)
  • Started HCO
  • Will test ramp the magnet next week (Jan. 21st-25th)
  • Will ramp the magnet for the run once beam is close to delivery.
• Surveys (Tim/Mark)
  • (ComCal will be surveyed during the DIRC-PrimEx transition)
  • (The Be target will be surveyed during the DIRC-PrimEx transition)
  • DIRC, to be surveyed Friday, Jan 25th.
• DAQ (Sergei).
  • Implementing DIRC's scalers and their transfer to EPICS.
• Trigger (Alex S.)
  • During DIRC commissioning, trigger will be the same as for GlueX production runs.
  • A LED trigger need to be implemented and tested before the run.
  • During PrimEx-Eta run, trigger will be the same as for ComCal Fall 2018 commissioning.
  • Need to set-up the CPP trigger . This will be done during the day allocated to CPP tests. Testing the special trigger should take about 2h of beam time.
• Beam line
  • Beam pipe
    • Old beam pipe to be installed Monday (Jan. 28th) and used for DIRC commissioning
    • New beam pipe to be installed during transition DIRC-PrimEx transition, and used for PrimEx-Eta run. The new beam pipe will not be ready in time. The old pipe will be removed during the transition and there will be no beam pine during the PrimEx run
  • Diamond status (Tim/Hovanes).
    • Discussion to install a low quality thick diamond (U.Conn. inventory) for DIRC commissioning: Schedule is too tight.
  • Tagger hodoscope (A. Somov)
    • Ready. There are several counters that are broken/have problems (see logbook entry 3643240. There is no spare nor time to fix them during the run. They will be dealt with at the calibration stage.
    • Sasha reminded us that the low-energy counters will need to be switched off during the DIRC high intensity runs.
  • Tagger microscope (Richard Jones/Beni)
    • Richard is analyzing dark rate data taken Monday (Jan. 21st)
  • Goniometer (Hovanes).
    • Ready
  • Collimator (Hovanes).
  • Active collimator (Richard Jones/Alexandre Deur)
    • Ready
  • Profiler
  • luminosity monitor (Hovanes).
  • Halo monitors
    • They have not been touched. They should be ready. To be checked.
    • Should be ready
    • Act. Col. baselines have been zeroed mid July 2018 and checked on 08/15. To be checked before Spring 2019 run.
  • luminosity monitor
  • PS system (Alex Somov)
    • Still need to be checked.
  • Beam line magnets (PS magnet sweeping magnet and tagger quads).
  • Polarimeter (Sebastian Cole/M. Dugger).
  • LH2 Target (Tim/Alexandre D.)
    • Target has been cool-down tested. It is working fine.
  • Be target
  • ⁴He target
  • TAC (Hovanes/Alex Somov)
    • Plan to cured after the Fall 2018 run was not performed. To be current between spring 2019 and fall 2019 runs?
      • During TAC runs. TAC to be inserted on beam line with 2cm offset to avoid damaged area
  • Slow control (Hovanes).
    • Working on DIRC. Hovanes worries that everything may not be ready on time (assuming the run starts on Jan. 30th).
    • ComCal. No new work needed. It is ready. <strike>
  • RF (Sergei)
    • To be checked
  • <strike>Radiation monitors (Alexandre D.)
    • Operational<strike>
• Detector systems
  • ST (Mark Ito)
    • Will be used for DIRC commissioning. Will remain in place for PrimEx-Eta run and used for the ⁴He run, but will be turned off for the Be part of the run.
    • Random trigger to be implemented (for Beni to monitor neutron radiation damage)
  • FDC (Lubomir)
  • CDC (Beni)
    • To be checked. Should be ready.
    • Will replace the flow controller by a rotameter.
  • BCal (Elton/Mark D.)
    • Will start HCO
  • FCal (Collin Gleason)
    • Will start the HCO on Wednesday (Jan. 23rd)
  • ComCal (Alex Somov)
  • TOF (Mark Ito/Beni/Alex. Ostrovidov)
    • Should be ready.
  • DIRC (J. Stevens)
• RSAD and ESAD Safety documents (Lubomir):
  • Documents submitted.
  • DIRC need to reply ro readiness review questions.
• Phones
  • System experts need to start looking for their on-call phones
• Hall Status/safety (Mark/Tim)
• Other topics?