January 12, 2022 CPP Design/Install Meeting

Meeting Time and Place

Thursday January 12, 2022, 3:00pm Bluejeans https://bluejeans.com/465620466

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

Agenda

• Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/December_02,_2021_CPP_Design_Meeting
• Testing status - Rory
• Design/Fab/Procurement status
  • Lead absorbers - in house/welding pads
  • All assembly hardware in house
  • Test install in the TEDF High bay - cpmpleted, much learned

• • Steel absorbers have been fiducialized
• Installation/assy 3D Model and dwgs all completed except Microscope move
  • LV attach
  • Scintillator orientation
• Microscope move
• Target Design in work
  
  
  
  
  • Most parts made (a good portion are 3D printed)
  • Will do a test assy next week

• 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

Minutes

• 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