Author: Johnstone, C.
Paper Title Page
Advanced Design and Simulation of Fixed-Field Accelerators  
  • C. Johnstone
    Fermilab, Batavia, Illinois, USA
  • M. Berz, K. Makino
    MSU, East Lansing, Michigan, USA
  • P. Snopok
    Illinois Institute of Technology, Chicago, Illlinois, USA
  Funding: Work supported by Fermi Research Alliance, LLC under contract no. DE-AC02-07CH11359
The development of new types of accelerators that allow wide choices of parameters, promote complicated fields, and often need to efficiently handle very large emittance beams requires the availability of new simulation environments to design and accurately predict operation. This is particularly true of Fixed-field accelerators, FFAs, which apply arbitrary-order fields - both alternating gradient, strong focusing - but also weak-focusing cyclotrons. This is especially applicable at medium-to-high energy combined with high intensity (mA currents). Synchrotron and cyclotron codes are generally inadequate to simulate accurately the performance of these strong-focusing fixed-field accelerators, particularly the new breed of non-scaling machines which have difficult, high-order fringe-field and edge-angle effects. One well-supported code, COSY INFINITY (COSY) is particularly suitable for accurate, high-order descriptions of accelerators. New tools have been developed in COSY INFINITY to address and accurately represent complex fixed-field machines in both a sector and spiral sector footprint. A description, application, and comparison of these tools with fields from magnet lattice design is presented.
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