October 14, 2021 KLONG Design Meeting

Meeting Time and Place

Thursday October 14, 2021, 1pm Bluejeans https://bluejeans.com/465620466

• Present - Hovanes Egiyan, Moskov Amaryan, Stephanie Worthington, Keith Harding, Igor Strakovsky, Tim Whitlatch, Mark Stevens, Johan Messchendorp

Agenda

• Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/September_02,_2021_KLONG_Design_Meeting
• Preliminary 3D Model
  • Collimator Cave Beamline
• Heat absorbed by Be and Tungsten (.6kw and 6Kw respectively)Johan study?

Requirements and things to finalize

• • Cool tungsten plug to below temperature that affects lead (327°C)
  • 5 cm beam tube to PS and 6 cm to final target
  • Moveable out of beamline
  • Be 90% pure or better
  • Steel standoffs in bottom poly sheet
  • 1mm al window ok for collimator exit of target?
  • Beryllium sealing - ongoing discussions with RadCon
  • Existing 5cm lead and 1cm steel at collimator exit wall ok
  • 10 cm lead at both walls inside collimator cave
  • 10 cm distance from beryllium target to downstream vacuum window of.
  • Remove PS vacuum chamber and put in 6cm beampipe
  • 5 mm gap between beryllium and tungsten so heat does not transfer

Minutes and Action Items

• need to look at thermal conductivity of whatever beryllium alloy is used

Action Items

• Look at strength and deflection of base structure - Tim
• Check to see if 6 cm pipe can fit through the shield wall at the collimator cave - Keith, Tim
• Check overall dimensions of the collimator cave to compare to 3D model - Keith
• Get Quote for 90% beryllium - Tim
• Continue working on collimator cave 3D model - Keith