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 to Spring 2018) until Nov. 15th.
- Then 10.3 GeV until Nov. 15th.
- Then 9.0 GeV until Dec. 19th.
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 530 nA on 1.4·10^-4 R.L. radiator (17 μm diamond).
- RSAD limit for most of the run, excluding high intensity tests: 600 nA on 1.6·10^-4 R.L. radiator.
FFB on or Position Slow Lock on (FFB doesn't operate below 50nA).
Radiators:
- Goniometer diamond radiators:
  - JD70-104 (17 μm - 1.4·10^-4 R.L., 7×7 mm²) - wider rocking curve - Tested in Spring 2018: Yielded reasonable polarization.
  - JD70-105 (47 μm - 3.9·10^-4 R.L., 7×7 mm²) - new crystal - good rocking curve
- We also have one 40 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, including with 17 μm diamond.

Target: LH2 target: cryogenic target

General Information

This document describes the run plan for the Hall D Fall 2018 run.

Schedule for the run:

Aug. 15th - 21st: Electron beam restoration
Aug. 21st - Oct. 28th: GlueX-I run (E=11.64 GeV).
Oct. 28th - Nov. 19th: DIRC and ComCal installation(? Solenoid will be ramped down but kept cool? )
Nov. 20th - Dec. 09th: GlueX-II and Primex tests. Lower energy measurement checks. (E=10.3 GeV)
Dec. 10th - Dec. 12th: Linac energy change.
Dec. 13th - Dec. 19th: GlueX-II and Primex tests. Lower energy measurement checks. (E=9.0 GeV)

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):
- Tests nA BPM and stripline BPM ?
- Test fast raster operation ?
Planned tests (Hall D):
- At 11.6 GeV:
  - Align JD70-105 (47 μm - 3.9·10-4 R.L., 7×7 mm²) (Hovanes) and take enough data to achieve ~1% statistic on rho polarimetry (less than a shift at 190 nA).
  - Fast raster beam characterization (R. Jones) ? Will necessitate high-current (??h)
  - High-intensity GlueX L1 and DAQ tests (A. Somov, S. Furletov) ?
  - Muon chamber test ? (parasitic?) (E. Smith)
  - TRD test (parasitic) (S. Furletov, L. Penchev)
- At 10.2 GeV:
  - DIRC commissioning (J. Stevens)
  - ComCal commissioning (A. Somov?)
  - Strait track run (L. Penchev)
  - ComCal test (no B-field, no DC on) (A. Somov?)
- At 9.0 GeV:

Expected Staffing and responsibilities:
- The Run Coordinator oversees the commissioning:
  - Aug. 15th-Aug. 21st, 7 days: Alexandre Deur (accelerator restoration)
  - Aug. 22nd-Aug. 28th, 7 days: Alexandre Deur
  - Aug. 29th-Sept 4th, 7 days: Cristiano Fanelli
  - Sept. 5th-Sept. 11th, 7 days: Colin Gleason
  - Sept. 12th-Sept. 18th, 7 days: Alexander Austregesilo
  - Sept. 19th-Sept. 25th: TBD
  - Sept. 26th-Oct. 2nd, 7 days: Naomi Jarvis
  - Oct. 3rd-Oct. 9th, 7 days: Stuart Fegan
  - Oct. 10th-Oct. 16th: TBD
  - Oct. 17th-Oct. 23rd: TBD
  - Oct. 24th-Oct. 28th: TBD
  - Oct. 29th-Nov. 17th: Hall open for installation
  - Nov. 14th-Nov. 20th, 7 days: Alexandre Deur
  - Nov. 21st-Nov. 27th, 7 days: Richard Jones
  - Nov. 28st-Dec. 4th, 7 days: Wenliang Li
  - Dec. 5th-Dec. 11th: TBD
  - Dec. 12th-Dec. 20th: Jeorg Reinhold

- 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, 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.
Align 17 μm diamond (JD70-104) for the 4 polarization configurations (Hovanes. 16h).
Gluex data production
- 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.
- 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 are 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.
Align JD70-105 (47 μm - 3.9·10-4 R.L., 7×7 mm²) for 2 polarization configurations (Hovanes 12h) and take enough data to achieve ~1% statistic on rho polarimetry (8h at 190 nA). Decide if it is better to run on this diamond.
Two TAC runs at the beginning and end of 11.6 GeV run. (Hovanes, Alex Somov 8/h run.)
Luminosity scans (J. Stevens)?
Some physics production data with thin diamond and 3.4 mm hole ?
Parasitic muon chamber run?
Parasitic TRD run
During 10.2 GeV run:
- DIRC commissionning (J. Stevens)
- ComCal commissioning (A. Somov)
- Gather data to be compared to CLAS results. (J. Stevens?) Intersperesed with above commissioning
- Luminosity scans? (J. Stevens?)
- Straight track run (16h end of 10.2 GeV period) (Lubomir)/ComCal test (A. Somov?)
  - Ramp down solenoid magnet (8h)
  - Take straight track run data (Lubomir)
  - ComCal test (no B-field, no DC on)
- Parasitic muon chamber run?
- Parasitic TRD run
During 9.0 GeV run:
- DIRC commissionning (J. Stevens)
- ComCal commissioning (A. Somov)
- Gather data to be compared to CLAS results. (J. Stevens?) Intersperesed with above commissioning
- Luminosity scans? (J. Stevens?)

Hall D situation room (current run plan)

Hall D counting room white board

Runplan time charts

Tasks achieved during Fall 2017:

File:Progress fall17.jpg

70px

Fall 2017 results

Spring 2018 time chart:

File:Spring18 week1.jpg

70px

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.

File:Spring18 week2.jpg

Run time chart. Week 2.

File:Spring18 week3.jpg

Run time chart. Week 3.

File:Spring18 week4.jpg

Run time chart. Week 4.

File:Spring18 week5.jpg

Run time chart. Week 5.

File:Spring18 week6.jpg

Run time chart. Week 6.

File:Spring18 week7.jpg

Run time chart. Week 7.