Run Coordination Meetings:Spring2019 Run
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Contents
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.)
- Goniometer radiators:
- 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:
- Jan. 22nd - 29th: Electron beam restoration
- Jan. 30th - Feb. 12th: 2-weeks DIRC Commissioning (Solenoid at nominal field. LH2 target))
- Feb. 12th: 1 day of CPP test?? (Solenoid at nominal field. LH2 target))
- Feb. 12th - Apr. 7th: 8.5-weeks PrimEx-eta run (Solenoid off. No target, then Be then 4He target ).
- Nominally, every Mondays: 12h of beam study. Every Tuesdays, if necessary: 8h of RF recovery.
- Accelerator overall plan and priorities:
- 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.
- Test fast raster beam envelope measurement with larger x-rastering?
- 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.
- The Run Coordinator oversees the commissioning:
- 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
- Link to Richard Jones program to plot the beam profile at the collimator.
- Links to previous runplans
- 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
- 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).
- Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 50 nA)
- Radiator (amorphous and diamond) must be retracted. Collimator should be in blocking position.
- 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).
- Typical levels are (for 2×10-5 radiator, electron beam current 50 nA)
- Insert 2*10-5 RL radiator. Call MCC and ask to mask the FSD and turn off beam each time a radiator is moved
- 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.
- 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).
- CDC HV scan (Naomi Jarvis, 4h) ??
- Align 17 μm diamond (JD70-104). 1 polarization configuration sufficient ?? (Hovanes. 8h).
- 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 radiation damage to ST)
- No TAC run necessary
- 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.
- Tests (to be done at various positions of passive shielding).
- End of test: remove shielding, ramp down solenoid.
- 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.
- TAC runs
- Long mode 10 min run. Twice or Thrice a week. Beam must be off. On opportunistic basis if possible (Purpose: monitor radiation damage to ST)
Hall D situation room (current run plan)
Hall D counting room white board
Runplan time charts
Accelerator status
Hot Checkout
- Hot Check OUT Status 3% ready ; 11% checked ; 86% not ready
Readiness for Fall 18 run
- Solenoid (Eugene/Beni)
- 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.
- DIRC
- DAQ (Sergei).
- Trigger (Alex S.)
- During DIRC commissioning, trigger will be the same as for GlueX production runs
- During PrimEx-Eta run, trigger will be the same as for ComCal Fall 2018 commissioning.
- Beam line
- Beam pipe
- Old beam pipe to be installed and used for DIRC commissioning
- New beam pipe to be installed during transition DIRC-PrimEx transition, and used for PrimEx-Eta 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)
- Tagger microscope (Beni/Richard Jones)
- Goniometer (Hovanes).
- Collimator, Active collimator, profiler, luminosity monitor (Hovanes/Alexandre Deur).
- 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)
- Beam line magnets (PS magnet sweeping magnet and tagger quads).
- Polarimeter (Sebastian Cole/M. Dugger).
- LH2 Target (Tim/Alexandre D.)
- Be target
- 4He target
- TAC (Hovanes/Alex Somov)
- Plan to cured (oven) after the Fall 2018 run?
- During TAC runs. TAC to be inserted on beam line with 2cm offset to avoid damaged area
- Plan to cured (oven) after the Fall 2018 run?
- Slow control (Hovanes).
- RF (Elton/Beni)
- Radiation monitors (Alexandre D.)
- Halo Monitors (Hovanes)
- Detector systems
- ST (Mark Ito)
- Will be used for DIRC commissioning. Will remain in place for PrimEx-Eta run, but turned off.
- FDC (Lubomir)
- CDC (Beni)
- BCal (Elton/Mark D.)
- FCal (Collin Gleason)
- ComCal (Alex Somov)
- TOF (Mark Ito/Beni/Alex. Ostrovidov)
- DIRC (J. Stevens)
- ST (Mark Ito)
- RSAD and ESAD Safety documents (Lubomir):
- Phones
- System experts need to start looking for their on-call phones
- Hall Status/safety (Mark/Tim)
- Other topics?