Tuesday, April 14, 2015 11:30am EST

Last meeting: Thursday, March 26, 2015 10:00am EST

Collimator working group meeting

Agenda

• Engineering
  • KK Intro. slides
  • Jason's summary
  • Supports
  • Water cooling
  • Remote adjustments
• Physics
  • power deposited sims
  • sensitivity sims

Minutes

Attending: Juliette, Jason, Ernie, Tyler, Seamus, KK, Jim

• Account extended at MIT, waiting for funds from JLAB
• KK's intro
  • 4 - downstream of target beampipe needs to be designed
    • definitely metal seals throughout
    • top could maybe be rubber
  • 5 - Collimator concept
    • collimator 3 catches lowest angle
    • power divided between 1 and 3
    • 5 does not exist, but other numbers are accurate
    • last green is new 5
  • 6 - estimated power still old numbers
    • new numbers are pretty close
    • beampipe shown as designed in slide 14
  • 7 - E158 Concept (won't work exactly)
    • micrometer controls to change orientation of collimator (x, y)
    • we have to support along radial direction in shadow of collimators
    • 1 and 3 have to be precisely placed
    • 1, 2 and 3, 4 could be single units but collimator 3 has slipped further upstream
  • 8-12 2-bounce system
    • Need to block line of sight to detectors
    • slide 4 - encircle beampipe close to target
    • beam pipe to shield photons from edge of 1 and 2
  • 13 - shows how to block line of sight
  • 14 - realistic geometry

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