RC Meeting and Run Plan, Friday, December 6th 2019

RC Meeting Information

RC Daily Meetings are at 4:15 PM, 2nd floor Counting House Meeting Room

• Bluejeans remote connection information:

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Useful Links

• Main Pol He-3 wiki
• Shift Schedule
• Hall-C Controls
• Hall-C Logbook
• MCC White Board

Notices

• Policy for CANS-related hall status change: Make a logbook entry when the hall goes in or comes out of laser-controlled access.
  • Good examples for entering and leaving laser access.
• Make sure beam-size is between 100-500um sigma.
• Still many TO day/swing shifts available! You don't need TO training, and will be guided on-site by the target experts!
• Magnet policies
  • HMS Q1 must be ramped down in 50A steps in all cases
  • Do not ramp HMS Q2 to zero, only go to 10A and then switch off power.

Experiment Status

Ongoing Issues

• Helium leak in Moller warm return, (Dave Gaskell) [1]
  • Warmup completed and hose replaced, will do full cooldown on Monday [2]
  • Maybe ready for spin-dance on Tuesday
  •  ?PD asked: can we "guarantee" to participate if spin-dance on Wednesday?
• Timing cuts and pre-run calibration (Eric, ongoing)
• HMS/SHMS rotation:
  • rotated to 20 degrees and parked, will need access to go to 30 degrees
  • rotation can be certified only after work on pivot completed (next week)
• Target Status
•  ?Q: beam orbit lock procedure?
•  ?Target names in target GUI and MCC consistent?
  • Can we use "carbon foil", "holy carbon" and "optics target" or do we need to be more specific when communicating with MCC?
• Needed for startup/beam authorization
  • Beamline checklist (Gaskell, DONE)
  • Tech checklist (Walter, in the loop)
  • Detector checklist (Brad)
  • Target checklist (JP)
  • ERR signature from Patricia and Ed
  • Radcon checklist

Resolved Issues

• Raster:
  • Min raster current for 1-2 pass set to 0, so don't need FSD mask.
  • Will use only single set of raster coils for 1-2 pass running to mitigate coil sync issue
• Operational restrictions on targets set as decided in yesterday [3]
  • Verified with experts that Be+Al windows are setup correctly (as required by safety and used for previous experiments).
• HMS/SHMS Magnets
  • Magnet control issues resolved [4]
  • Powered-on magnets to 2GeV, found issue with HMS Dipole NMR [5], Steve L. rebooted ioc (fixed).
  • Checked magnets today (including HMS dipole NMR), they are good to go [6]
• Approximate Unser calibration available, good to go for non-intrusive BCM scan [7]
• Timing cuts and pre-run calibration (Eric)

Run Plan and Scheduling

• Target work going on during day today (JP/Todd/Simon/Ethan) to setup controls and finish alignment
• Finish target work tonight
• If good-to-go, inform Walter tomorrow at 7:00am that we need techs to help close up
• Should be ready for beam by SWING Saturday at 2-pass
• If target not ready/no beam authorization, try for Sunday, else Monday
• Saturday DAY shift workers can assist with final hall work if needed
• Participate in Spin Dance if possible (5-pass)

Startup run plan through weekend/Monday

• Establish beam (~1-2 days) (empty target and carbon-hole)
• Commission spectrometers (C-hole and/or 7-foil optics target)
• Do 2-pass optics (1-2 shifts) (7-fold optics target)
• Commission target (PolHe3 target)
• Tentative 2-pass run plan [8]

Other

• MCC White Board

Special Requests

• Please be gentle with our target :-)