November 18, 2021 CPP Design Meeting

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Meeting Time and Place

Thursday November 18, 2021, 3:00pm Bluejeans

  • Present - Elton, Dave, Stephanie, Ilya, Rory, Mark S, Beni, Simon, Mark I


File:Cpp install assy.pdf
  • Installation/assy 3D Model and dwgs
    • DS Chamber orientation
    • Scintillator orientation
    • assembly components - drawings released
    • Installation drawings in review
  • Target Design in work
    Cpp target5.jpg
    Cpp target6.jpg
    Cpp target7.jpg
    Cpp target8.jpg

  • Things to work out
    • Gas system, manifold/bubblers (Beni has some)
    • Complete structural analysis - approved by Tom Renzo - need to release into system
    • Develop Detailed installation plan
    • Develop Design/operational/Maintenance Requirements
    • Modified US vacuum system
    • Solid target installation
    • Installation drawing including Microscope move
    • CPP Detector operations in Hall D OSP
    • Possible use of nitrogen flow for cooling electronics in Faraday cage


  • Elton met with nick and discussed LV box. Need to make bracket smaller (1/16" thick) boxes should be on top-north corner of each chamber
  • For fiducializing chambers, all four edges or bolt holes can be used to find center. Machining is very accurate
  • Proposed chamber orientation good - horizontal x-ray port DS, Vertical x-ray port US
  • Rory/Elton requested 4 scintillator paddles, 2 BL and 2 BR in vertical position equally spaced (15" oc). To be held by light guides, maybe a V block
  • Lead Target needs to be pressed flat since it is malleable and has the center protruding

Action Items

  • Stephanie to design thinner "L" bracket for the LV box
  • Tim - Get with S&A group to discuss chamber fiducialization and alignment
  • Rory to flatten lead target
  • Stephanie to model and place scintillators and attachments
  • Release installation drawings - Tim/Stephanie
  • continue work on target installation - Bobby