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:
  - 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 40 μm Al radiator.
- Amorphous
  - 1.64 µm Al (1.86·10^-5 R.L., see study)
  - 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:

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

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

Accelerator overall plan and priorities:

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) and take enough data to achieve ~1% statistic on rho polarimetry (less than a shift at 600 nA).
- If simulation available: Fast raster beam characterization (R. Jones) Will necessitate high-current (??h)
- Beam halo measurements to assess background for PRad target TAC runs. (A. Deur/Hovanes/A. Somov 1h×2)
- High-intensity GlueX L1 tests (A. Somov) (2 instances of 2h separated by a day, I≈500nA)
- High-intensity GlueX DAQ tests (S. Furletov) (2 instances of 2h separated by a day, I≈500nA)
- TAC V-wire commissioning (Hovanes) (3h)
- If simulation available: Systematic TAC study:runs with different materials in the photon beam line. (A. Somov ??h)
- If simulation available: Systematic PS acceptance study with collimator pos. offset (A. Somov ??h)
- CDC and FDC HV scans (L. Penchev, Beni Z.)(4h×2)
- CDC and FDC readout tests (N. Jarvis, 1h)
- ToF non-linearity test (Beni Z., S. Furletov) (1h×2 Separated by a few days)
- Microscope yield study (Richard/Jim McIntyre/Alex Barnes, 1h)
- Recovery after 2-week beam down due to transformer repair (A. Deur)
- CDC background studies (L. Penchev)
- 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. 5th-Jan. 11th, 7 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: Mark Dalton
  - 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 (accelerator down for repairs)
  - March 14th-March 28th, 14 days: A. Deur (accelerator down for repairs)
  - March 28th-Apr. 4th, 7 days: Naomi Jarvis
  - Apr. 4th-Apr. 11th, 7 days: David lawrence
  - Apr. 11th-Apr. 18th, 7 days: Colin Gleason
  - Apr. 18th-Apr. 25th, 7 days: Mark Dalton
  - Apr. 25th-May. 2nd, 7 days: Stuart Fegan
  - May. 2nd-May. 6th, 4 days: Alexander Austregesilo

- 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
- 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 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).
  - 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 and at -4.2 A. (It can be turned on only once the Hall is n 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 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.
  - 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
- Microscope yield study (row-by-row scan). (Richard/Jim McIntyre/Alex Barnes, 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.
- 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. 3h).
- Reestablish DAQ (Sergei, 2h).
- General detector calibration (Sean Dobbs. 8h). Use 10^-4 radiator.
  - Run 15 min in Long Mode.
- CDC and FDC HV scans (1) (L. Penchev, Beni Z.)(4h×2)
  - CDC readout tests (N. Jarvis, 2h, in parallel with CDC and FDC HV scans (1))
- Bleed-through tests from other hall bunches.
- From here on, the tasks below are interspersed with data production
Realign 60 μm diamond (JD70-100) for the 4 polarization configuration (Hovanes, Paul Mattione. 16h/diamond).
Beam background measurements for PRad target TAC runs. (A. Deur/Hovanes/A. Somov) 10-250nA, no radiator, TAC in, target full. 1h. Several runs throughout Fall/Spring run periods.
Straight track run (16h, nominally at the end of the Fall run. Otherwise, end of Spring run) (Lubomir)
- Ramp down solenoid magnet (8h)
- Take straight track run data (Lubomir)
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).
- 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).
Parasitic muon chamber
Parasitic TRD run
List of tasks to be done without solenoid field

Hall D situation room (current run plan)

Hall D counting room white board

Runplan time charts

Tasks achieved during Fall 2017:

Fall 2017 results

Spring 2018 time chart:

Spring 2018 commissioning/run time chart. Week 1.
The horizontal scale is the time during which beam is available (in other words, it would be the real time with 100% of beam efficiency).
The task time estimates given on the plot have 100% contingency.