January 14, 2021 CPP Design Meeting ERR discussion

Meeting Time and Place

Thursday Jan 14, 2021, 2pm Bluejeans https://bluejeans.com/465620466

• Present - Elton, Dave, Stephanie, Ilya, Rory, Mark S

Agenda

• Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/December_17,_2020_CPP_Design_Meeting
• Readiness Review February 10
  • Charge Media:HallD_CPP-NPP_charge.pdf
  • Agenda?
  • CPP and NPP Readiness Review
• Schedule

          Media:CPP_Schedule_before_primex_v2.pdf 
          Media:CPP_Schedule_after_primex.pdf

• Solid Pb target support and installation Media:CPP_Target_pic.pdf
• Design/Procurement status
• New Detector position - 3 inches DS to make dark room bigger

• Things to work out
  • Gas line manifold
  • Complete structural analysis
  • Develop Detailed installation plan
  • Develop Design/operational/Maintenance Requirements
  • Modified US vacuum system
  • Solid target installation
  • Documentation for ERR

Minutes and Action Items

• ERR discussed - 3 talks to address charge questions
  • Decided to use schedule with CPP run first then Primex - keep other as backup
• Target Discussion
  • Rory has target from previous experiment we will use (lead)
  • Need manual insertion of lead and empty target with good precision (change 1X per day)
  • Need vacuum right up to target (thin kapton window -125 microns)
  • Desire helium bag inside CDC
  • Need to develop design for target change out that can be done quickly and precisely
  • Target location 64 cm US of existing target (Hall D 1 cm US of 0,0)
  • Vacuum system needs to be designed -continue 1.5 inch tube
• Need to develop talks for CPP review to address charge
• Detector move DS 3 inches to make room in Darkroom for library ladder