Thursday, April 9, 2020 2pm ET

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Agenda

• Slack signup
• Status updates
• Next meeting

Minutes

Attendance: Chandan, Dave, Sakib, KK, Probir, Randy, Ruben, Renuka, Sandesh, Juliette, Jim Fast, Robin

• Status of the sensitivity sims (Sakib)
  • Configurations defined (nominal, worst case for physics and beam)
  • Septant 4 is the open septant in horizontal plane (beam right)
  • Need an intermediate step - 6 and 4 asymmetry fit
    • put in the asymmetry and extract something assuming that the field map is perfect
  • Probir - what is the minimum E?
    • go down to 10.4 - 10.6 GeV without changing anything
    • if we know in time, then can go lower and adjust collimators
• Tentative Timeline
  • April 23 - 1st results
  • May 7 - conclusions
  • June - tentatively downselect for hybrid
• Status updates
  • Envelopes - Chandan
    • field map - both segmented and hybrid
    • collimators 1 and 2 should be the same; downstream of collimator 4 - coll 5 might be subtle changes
    • lintels/collars - possibly subtle changes
    • just create the envelopes without optimizing anything for
  • Doses between the two
    • on coils
    • support straps
  • Forces (Sandesh)
    • Compared the force scenarios between the hybrid and segmented (Eric)
    • Still need the temperature gradient for thermal motion
    • Jim Fast question: concerned about twisting - deflection expected - at end of coil - 0.4 mm
    • don't want to dump heat at inlet side
• Next meeting
  • April 23rd - 2pm EST

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