Run Coordination Meetings:Summer2022
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Contents
Summer 2022 CPP/NPP run
Connect Information
Meeting are via ZoomGov: connect
Meeting ID: 160 199 0060 / Passcode 8394
Beam and Hall configuration
- Experiments: NPP and CPP: June 8th- July 27th 2022. (Followed by PrimEx, start on Aug. 4th 20202).
- Beam energy expected:
- Expected: 11.57 GeV.
- Solenoid:
- Standard, 1350A
- Pair Spectrometer: 6/9 = 0.67 of its nominal field (569.4 A = 0.67x849.9 A)
- Microscope range: [0.301-0.514] of the beam energy or [4.57-6.01 GeV]
- CW Beam:
- 250 MHz frequency.
- Current: 1-100 nA (exceptionally up to 300nA if needed).
- Chopper slit: ??To minimize bleedthrough, use Hall B slit whenever they are at 5-pass (full run period except first 4 days). Use Hall A slit the first 4 days (Hall A starts later)??
- Position Slow Lock on or FFB on (FFB doesn't operate below 50nA).
- Radiators:
- Goniometer radiators:
- Diamond JD70-103 (50 μm - 4.1·10-4 R.L., 7×7 mm²) - New crystal - Not expected to be great according to rocking curve.
- Diamond JD70-107 (55 μm - 4.6·10-4 R.L., 7×7 mm²) - New crystal - Not expected to be great according to rocking curve.
- (Diamond JD70-105 (47 μm - 3.9·10-4 R.L., 7×7 mm²) - Spent: used for the second part of GlueX's Fall 2018 run and Fall 2019/Spring 2020/Fall 2021)
- (Diamond JD70-106 (50 μm - 4.1·10-4 R.L., 7×7 mm²) - Aligned and used shortly during Tagger Accidental test in Spring 2020. Did not display sharp coherent peak.)
- (Diamond JD70-109 (50 μm - 4.1·10-4 R.L., 7×7 mm²) - New crystal - Not expected to be good according to rocking curve.)
- Amorphous 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)
- 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: Default running: 3.4 mm.
- Targets:
- Lead target: 0.3mm, 5.4·10-2 R.L.
- PS converter: 750 μm
- Miscellaneous:
- PS test area: Pb-W module tests (A. Somov)
General Information
This document describes the run plan for the Hall D Summer 2022 run.
- Schedule for the run (see Oct. 2021-March 2023 official schedule):
- June 1st - 7th: Electron beam restoration.
- June 8th - July 27th: CPP/NPP run
- Accelerator overall plan and priorities:
- Deliver physics beam to 4 halls. Hall A starts later, on July 7th??. Hall A pass(es): TBD. Halls B and or C will always be at 5th pass (except for 4 days for Hall B), so Hall D beam will always be RF-separated and at 250 MHz.
- Hall D plan
- Experiments: CPP and NPP
- Tentative commissioning plan
- TAC runs (2 or more)
- Energy calibration run: 5min every 2 days with CW beam, I=100nA
- Straight track run. Tentatively between a TAC run and beam studies (to save on overhead): Ramp down the solenoid during beam study. Do the straight track run (6h if the beam delivery is good). Follow with a TAC run while ramping back up the solenoid.
- No invasive non-CPP/NPP tests are planned.
- Expected staffing and responsibilities:
- The Run Coordinator oversees the run:
- June 1st-June 7th: 7 days: Alexandre Deur (accelerator restoration)
- June 8th-June 15th, 7 days: Alexandre Deur
- June 15th-June 22nd, 7 days: Mark-Macrae Dalton
- June 22nd-June 29th, 7 days: Maomi Jarvis
- June 29th-July 6th, 7 days: Benedikt Zihlmann
- July 6th-July 13th, 7 days: Ilya Larin
- July 13th-July 20th, 7 days: Elton Smith
- July 20th-July 27th, 7 days: Rory Miskimen
- The Run Coordinator oversees the run:
- The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (M. Stevens) verify that the proper safety rules are followed. PDL is:
- PDL: Simon Taylor, Deputy PDL: Lubomir
- The analysis coordinator, Alexander Austregesilo, oversees the off-line diagnostic of the different systems and analysis of the data.
- Shifts: 2 persons per shift. 4 shifts per day Shift Schedule
- The Physics Division Liaison (PDL) and Hall D Work Coordinator/Safety Warden (M. Stevens) verify that the proper safety rules are followed. PDL is:
- 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: Daily. Broadcasted on ZoomGov. 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
- Verify electron beam quality and establish photon beam (assume 1 day).
- Ion Chambers trip threshold must be set using diamond JD70-105 as well as the 4 Al. radiators (1 on goni, 3 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 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 75 nA and 100 nA. There is 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 75 nA and 100 nA
- Run 3 min with the 3*10-4 radiator (Call MCC). Beam current: 50nA. Repeat at 75 nA and 100 nA
- 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.
- Any time before starting production (beam quality is not important): microscope HV scan (2h, R. Jones).
- Establish L1 trigger, step 1: BCal trigger needs to be re-established before the ToF HV scans below. (Alex. Somov. 2h).
- ToF calibration (Beni, 6h). In parallel, CDC HV scans (Naomi). Use ??4.5×10-4 Al. radiator (on goni)??. Beam current 100nA
- Establish L1 trigger, step 2: CPP/NPP trigger (Alex. Somov. ??h).
- PS and TAGH HV scan. (Alex. Somov. 1h).
- Establish DAQ (Sergei, 2h).
- General detector calibration (Sean Dobbs. (703-887-1776) 1h). Use 1×10-4 Al. radiator. Beam current 100nA
- Run 15 min (solid time) in Long Mode (Mode 10)
- Run 15 min (solid time) in Production Mode (Mode 9).
- 50/55 μm diamond (Start on JD70-10?) alignement. 2 polarization configurations?? (Hovanes. 8h ). If the first diamond does not look good, Hovanes will align the second one. We need to know how much time CPP/NPP leadership wants to allow for diamond alignment.
- CPP/NPP tentative commissioning plan
- CPP/NPP run
- Standard configuration: ~50 μm diamond, 27 nA, 3.4 mm hole, TPol on 750 μm TPol convertor??. 2h runs and no more, as it may be hard to correct for calibration drifts. ??Cycle over 5 sets of runs: 0o (twice, or alternate??), then 90o (twice, or alternate??) then amorphous runs.??
- Amorphous runs: 4.5×10-4 Al. radiator (on goni). 27 nA
- Log in run information in the shift summary (make a run list). For each production run, log useful comments on DAQ comment window, see [1]
- Tagger quadrupole on
- Harp scans (30 min): Every 2 days?? May need to be done more often because the 3.5mm collimator will be used.
- Energy calibration runs: 5min every 2 days with CW beam, I=100nA
- Empty target run(s). How many?? 27 nA??: data taking duration?? 30min overhead to prepare the target (29min58s for rapid access/exit, 2s to flip the target switch).
- Standard configuration: ~50 μm diamond, 27 nA, 3.4 mm hole, TPol on 750 μm TPol convertor??. 2h runs and no more, as it may be hard to correct for calibration drifts. ??Cycle over 5 sets of runs: 0o (twice, or alternate??), then 90o (twice, or alternate??) then amorphous runs.??
- TAC runs. At least 2 runs.
- a few nA, thinest Al. radiator and ComCal.
- To be coordinated with MCC.
- Measure bleedthrough. If acceptable, (~nA or less), proceed with TAC-ComCal run. Otherwise, explore possibility for invasive TAC run.
- ??Long mode run. Once a week (20 min).??
- Amorphous run. ??Every set of 5 diam. orientation runs. 1h Standard production current. Time to switch from pol. to unpol.: 10min. time to switch from unpol. to pol.: 30min.??
Hall D situation room (current run plan)
Hall D counting room white board
Accelerator status
Hot Checkout
To be completed by Tues. May. 31st
0% ready ; 0% checked ; 100% not ready
Readiness for Summer 2022 run
- Solenoid (Eugene/Beni):
- Surveys (Tim/Mark Stevens/Scott)
- DAQ (Sergei).
- Trigger (Alex Somov).
- Beam line
- Diamond status (Tim/Hovanes).
- Tagger hodoscope (A. Somov).
- Tagger microscope (R. Jones/Beni).
- Goniometer (Hovanes).
- Collimator Motion (Hovanes).
- Active collimator detectors(R. Jones/A. Deur)
- Profilers (Hovanes)
- Luminosity monitor (aka Active Target) (Hovanes).
- Halo monitors (Hovanes)
- PS system (Alex Somov)
- Polarimeter (M. Dugger/Beni/Fernando).
- Pb Target (Tim)
- TAC (Hovanes/Alex Somov).
- Slow control (Hovanes).
- RF (Sergei)
- Radiation monitors (A. Deur)
- x-ray W shield (Tim/Lubomir).
- Detector systems
- ST (Beni)
- FDC (Lubomir).
- CDC (Beni).
- Gas system (Beni/Lubomir)
- BCal (Mark Dalton)
- FCal (Mark Dalton)
- ComCal (Alex Somov).
- TOF (Beni).
- Pb absorber and muon detector (Elton??/David Lawrence??/...??)
- DIRC (Justin).
- GEM/TRD (Sergei/Lubomir).
- Monitoring (Alexander Austregesilo)
- RSAD and ESAD Safety documents (Simon):
- Phones
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.
- Management cautions AGAINST opening them from other locations or offsite, out of concern for available bandwidth.