General Meeting Summary 1/8/15

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IDAHO TEST PLAN

  • Test time: 1-2 days preferably Mon/Fri during the week of 16 February 2015.
  • A draft edited by Hamlet's group, Carlos, and Julie is posted on the Wiki
  • Main goals: irradiation studies of PWO at higher dose rates than available at JLab
  • Discussion about irradiation procedures, transmittance measurement, and shipping the crystals after irradiation
  • PbF2 was irradiated from one end and if got poor performance flipped the crystal - requires clear labeling of the crystals
  • PbF2 runplan included irradiation, transmittance measurements with device from OU, and blue light curing sessions
  • Action item for PWO irradiation studies: get OU device to JLab and calibrate against the setup there - Hamlet will get in touch with Julie
  • PbF2 was transported in little boxes by FedEx. Crystals may have stayed in Idaho for a few weeks after irradiation tests complete
  • Action items for PWO transportation:
  • locate boxes for transportation
  • locate/procure a box that can keep the crystals cold (to reduce recovery - quality of data will depend on this annealing)
  • temperature tracking?
  • determine pricing for shipping crystals to/from Idaho, e.g., FedEx or other freight companies (CUA used Radiant Logistics for other shipments)
  • Discussion about alternative transmittance measurements
  • So far transmittance measurements planned for full wavelength spectrum. If one only measured a few representative wavelengths perhaps one could use lasers? Challenge with such a setup may be alignment/stability of laser
  • Discussion about manpower
  • Ideally would have 3-4 people to cover the shifts

SWEEPING MAGNET (SLIDES FROM BOGDAN, CHARLES, PAUL)

  • Based on kinematics table, the smallest angle requirement driven by DVCS. WACS angles larger, but field integral more demanding
  • Discussion of the horizontal magnetic field concept
  • assumes distance 157 cm from center of magnet to pivot
  • concept gives acceptance consistent with kinematic table
  • fringe fields compensated with field clamp and "mini magnet"
  • for DVCS where one needs the small angles of HMS would have to remove part of the iron
  • works with existing power supplies at JLab

ITEMS FOR NEXT MEETING:

  • Idaho irradiation studies
  • Caltech irradiation studies?
  • Other...


NEXT MEETING: THUR., 29 JANUARY 9:00 AM (EST)