Meeting 5 October 2017

PRESENTATIONS

Magnet Design

NOTES

• Discussion of magnet updates

• Previously make projections with toy model, but in real magnet have coil and other things to take into account - this is addressed here
• New design has shaped/flared field - allows to go to higher field (integrated Bdl is 1 T-m)
• Shorter magnet

• note: typically define magnet length through edges of magnetic field, coils may be longer - details have to be studied in simulation
• originally had 2 T-m, now caps are small and put in copper core --> smaller field

• Change materials for better heat conductivity (shield heat) - realistic materials

• energy deposition decreases with distance - after 20 cm trajectory entirely in material (copper)
• if conductivity was the only aspect and if volume is small, one may consider silver as central absorber - higher Z and better conductivity
• Initial calculations show very small bend angle, so expect no significant focusing effects, but need to check in simulation

• Discussion about not limiting design power to 30 kW to make a more uniform design with Hall A/C and Hall D

• What is the max power limit for the Hall A/C design? - try to estimate

• Discussion about safety factors that may come up in a readiness review

• Handling of internal activation in context of decommissioning
• Try to estimate after implementing the new materials - could compare CPS internal activation with that of beam dump

• Discussion of readiness review and funding

• Condition for experiment approval from PAC45 is to prove that design works at estimated price and show that this achieves a certain photon intensity

• To achieve this, need to confirm/show feasibility of conceptual design and document CPS - time estimate is 6-9 months

• Next is an internal review by the lab that needs to be scheduled with B. McKeown (can be documents, presentations or both)

• One possible funding option is MRI program - need to look in more detail at precedents

• CPS Collaboration Meeting

• Will be in week of January 22 together with NPS Collaboration Meeting

• Some talk suggestions: Magnet Concept, Rotatable Target Update, Additional Science ideas

• Please send additional talk topic to hornt@cua.edu by 19 October

• Also aim for having a talk on Status of CPS integrated into Hall A/C meeting taking place in the same week

HOMEWORK

• Implement design into simulation and address questions

• Power deposition
• Prompt radiation
• Activation
• Other details

• Start CPS documentation in context of readiness review

• Estimate of max power limit for the Hall A/C design and comparison of internal CPS activation to that of beam dump