Meeting 21 February 2020

DISCUSSION MATERIAL

• CPS 2020 Action Items

• Radiation Simulations: optimizing material and dimensions

• Update from CPS beamline meeting

• Update from KLong and GlueX collaboration meetings

• TCS Update

ACTION ITEMS

• Remind Radcon about sending numbers

• CPS radiation simulations: additional tests to finalize CPS optimized geometry (see emails)

• Hall D - prepare a sketch model of magnet

• TCS: for Q2=5 GeV2 want reliable extraction of CFF and show that one can have a good measurement in Hall A/C

SUMMARY NOTES

RADIATION SIMULATION

• discussion of a number of different simulations carried out to optimize cost, material, dimensions - done in two ways: 1) geometry, material, layering, and 2) pure material

• If replace all tungsten with lead, then prompt radiation significantly worse, but activation levels still looks good

• Replacing tungsten by lead in the backward region has reasonable prompt and activation levels depending on how much lead is used - lead below z=0 seems a good compromise

• Having a lead "frame" outside (2.5 cm top, 5cm bottom) helps to reduce radiation levels even further