Difference between revisions of "Fall 2018 GlueX Run"
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== Runplan time charts== | == Runplan time charts== | ||
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− | + | Spring 2018 commissioning/run time chart. Week 1.<br/> | |
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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).<br/> | 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).<br/> | ||
The task time estimates given on the plot have 100% contingency. | The task time estimates given on the plot have 100% contingency. | ||
[[File:spring18_week2.jpg|70px|thumb|none| ]] | [[File:spring18_week2.jpg|70px|thumb|none| ]] | ||
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Revision as of 08:16, 13 August 2018
Contents
Fall 2018 GlueX Run
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.)
- Goniometer diamond radiators:
- 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:
- At 11.6 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 Run Coordinator oversees the commissioning:
- 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.
- The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (T. Carstens) verify that the proper safety rules are followed. PDLs are:
- 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).
- Typical levels are (for radiator retracted, collimator fully blocking, electron beam current 50 nA)
- Hall D tagger CARMS, Ion Chamber and BLM threshold for beam trips should not be changed without approval of Hall D leader.
- 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 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).
- 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.
- 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/45o/135o 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
Fall 2018 time chart:
- View Runplan google calendar
- Edit Runplan google calendar
- MCC white board
- Spreadsheet: number of triggers
Accelerator status
Hot Checkout
- Hot Check OUT Status 100% ready ; 0% checked ; 0% not ready
Readiness for Fall 17-Spring18 run
(This section is commented out for clarity)