Difference between revisions of "Run Coordination Meetings:Winter2024"
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#* Active Collimator calibration. (<0.5h, Richard Jones). | #* Active Collimator calibration. (<0.5h, Richard Jones). | ||
#**re-Insert the 10<sup>-4</sup> radiator (Call MCC). Use about 100 nA beam current. This will provide the Act. Col. nominal positions for its high gain values. | #**re-Insert the 10<sup>-4</sup> radiator (Call MCC). Use about 100 nA beam current. This will provide the Act. Col. nominal positions for its high gain values. | ||
− | #**Insert the | + | #**Insert the 2×10<sup>-5</sup> radiator (Call MCC). Use about 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 both for low and high Act. Col. gain. | #**Record on the white board what is the beam position on 5C11b and Active Collimator for both for low and high Act. Col. gain. | ||
#**Once Active Collimator nominal beam position is known, retract profiler and lock the beam (MCC) on the active collimator. | #**Once Active Collimator nominal beam position is known, retract profiler and lock the beam (MCC) on the active collimator. |
Revision as of 07:04, 12 March 2024
Contents
- 1 Winter 2024 Run
- 2 Connect Information
- 3 Meeting General Agenda
- 4 Beam and Hall configuration
- 5 General Information
- 6 Runplan
- 7 Hall D situation room (current run plan)
- 8 Accelerator status
- 9 Hot Checkout
- 10 Readiness for Winter 2024 run
- 11 Live Camera Feeds from the Four Counting Houses
- 12 Running Shifts Remote
Winter 2024 Run
GEM-TRD detector test (March 11 - 14 2024)
Connect Information
To connect from the outside by phone please do the following
1.) To join via ZoomGov: connect Meeting ID: 1613772645 / Passcode 8394
2.) To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 1613772645.
3.) To join via phone, use one of the following numbers and the Conference ID: 1613772645.
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: 1613772645 and #
- You may have to unmute the microphone: #*4
- Turn the computer on if needed
Meeting General Agenda
Run planning meetings:
Beam and Hall configuration
- Experiment: Test
- Beam energy expected:
- 11.7 GeV
- Solenoid:
- OFF (Cooled at 80K)
- CW Beam:
- 500 MHz frequency
- Range: 1-200 nA.
- Chopper slit: tentatively B
- Standard current and amorphous radiators on amorphous ladder
- ~ TBDnA on 1.64 µm Al (1.86·10-5) amorphous radiator
- Position Slow Lock on or FFB on (FFB doesn't operate below 50nA).
- Radiators:
- 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.)
- Amorphous
- Tagger quadrupole on (-4.2 A). (Not necessary but as a check-out/good habit.)
- Collimator hole. Default running: 5.0 mm.
- Targets:
- H2 target. Warm empty cell
- PS converter: 750 µm
- PS test area:
- GEM-TRD detector (Lubomir, Sergei)
- Six GEM detectors (Kondo)
- Detectors:
- Off except Tagger hodoscope, PS magnet and PS coarse detectors.
General Information
This document describes the run plan for the Hall D Winter 2024 test-run.
- Schedule for the run (see Oct. 2023-May 2025 official schedule):
- March 11th-14th: 3 days for electron beam restoration, photon beam check-out and GEM-TRD test.
- Expect at most 2 days of beam: March 11: Pass change (priority); and March 13: Maintenance day, ideally to coincide with GEM-TRD gas change to Kr.
- End of test run: Friday 14th, 7am
- March 11th-14th: 3 days for electron beam restoration, photon beam check-out and GEM-TRD test.
- Accelerator overall plan and priorities: Deliver physics beam to Hall C (3-pass, not 4-pass as in the official schedule).
- Hall A: off (configuration change)
- Halls B: off (configuration change). Resume operation on Friday March 15th.
- Hall D plan
- Test GEM-TRD using the PS test area (priority. Lubomir P., Sergei F.).
- Test 6 GEM detectors (Kondo G.)
- Expected Staffing and responsibilities:
- The Run Coordinator oversees the run:
- March - 11-14, 4 days: Alexandre Deur
- The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (S. Spiegel) verify that the proper safety rules are followed. PDL is:
- PDL: Benedikt Zihlmann
- Shifts: 2 person shifts: 1 leader focusing on standard shift duty + GEM-TRD specialist. Shift schedule.
- The Run Coordinator oversees the run:
- 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.
- Run meetings: broadcasted on Zoom. 8:45am in the counting house conference room. The Run Coordinator will be responsible for organizing and chairing the meeting.
- Useful links:
- Accelerator schedule and information
- Link to Richard Jones program to plot the beam profile at the collimator.
- Links to previous runplans
- Web-accessible EPICS information
- 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
- Make sure all radiators (from goni and amorphous ladder) are retracted. Active Col. in blocking position. Profiler retracted. Check that magnets are at their nominal fields.
- Verify electron beam quality (assume 1 day)
- Establish photon beam (assume 1 day).
- Ion Chambers trip threshold must be set using the 3 Al. radiators on amorphous radiator ladder)
- 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 ~30 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= ~ 50 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 technical issues in doing our harp scan arise, then it may be skipped.
- Insert profiler (no need for masking FSD when an object is inserted in the photon line), run with 1×10-4 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. Keep monitoring this position; produce a strip chart and log it.
- Radiation level study (1h): if you feel up to the task, strip chart the five radiation monitors (see above) and log them.
- 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. There is no need to run the DAQ or stop the beam between each steps: the data are recorded by EPICS. However, the beam need to be off when moving to a different radiator for the next steps.
- 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
- Inform Richard Jones that we are getting ready to use the Active Collimator, and ask him if he needs to check the Active Collimator with the beam.
- keep profiler in and beam locked (MCC's duty) on the nominal 5C11b and x=0,y=0 profiler position.
- Active Collimator calibration. (<0.5h, Richard Jones).
- 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.
- Insert the 2×10-5 radiator (Call MCC). Use about 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 both for low and high Act. Col. gain.
- Once Active Collimator nominal beam position is known, retract profiler and lock the beam (MCC) on the active collimator.
- GEM-TRD test (Sergey Furletov, Lubomir Penchev)
- With good transmission, we expect 8.6kHz for PSC total rate for 100 nA, 2×10-5 Al. radiator, 750 um converter and 5mm colimator hole.
- Standard configuration: 2×10-5 Al. radiator, TBD nA (50nA<I<200nA)
- Start with Argon/CO2 for checkout (About 2 shifts). Then switch to krypton. Gas change: 5-6h. Run with Kr until the end of the run).
- Switch to krypton: Gas change: 5-6h. Remote procedure, no need for access
- Run with Kr until the end of the run. There will be 8 Rapid Access of about 1h each (15min actual work, 45min access procedure/overhead) to switch to various TRD radiators.
Hall D situation room (current run plan)
Hall D counting room white board
Accelerator status
- Link to accelerator short term schedule (White board)
- Link to accelerator SAD calendar
- Bluejeans code for the daily MCC meetings and Wednesday 1:30 meeting: 569476853
Hot Checkout
To be completed by March. 8th
100% ready ; 0% checked ; 0% not ready
Readiness for Winter 2024 run
- Target and most detectors to be masked.
- Need to be under vacuum
- Beam line
Collimator Motion (Hovanes)- Active collimator detectors(Richard)
- Profiler (Hovanes)
- Low voltage problem (Solved). Need to find front plate. (A new plate was machined)
- Halo monitors (Hovanes)
- Slow control (Hovanes).
- TPol converter motion (Hovanes) .
Radiation monitors (A. Deur)x-ray W shield (Tim/Lubomir/Justin).
Detector systems- PS coarse counters
- Hodoscope
- RSAD and ESAD Safety documents (Lubomir/Beni):
- All documents are ready, signed and in the counting house.
- Today (01/10/2023 is the last day to read and sign the 2023 General Access Radiation Work Permit (RWP, SAF801kd) before access to the accelerator site is revoked
- RSAD link
- Hall D safety and training pages.
- Phones
- System experts should start looking for their phone and charger.
- System experts should have found their on-call phones by now and should start charging them.
- System experts should start carrying their (charged) phone.
- Hall Status/safety (Tim/Scott)
- Other topics?
Live Camera Feeds from the Four Counting Houses
- These feeds SHOULD be open and visible at all times from one of the monitors in each of the counting houses. (currently this is not working; we should post instructions how to establish this connection. J.R.)
- Management cautions AGAINST opening them from other locations or offsite, out of concern for available bandwidth.