Numerical Studies of Optimization and Aberration Correction Methods for   the Preliminary Demonstration of the Parametric Ionization Cooling (PIC)   Principle in the Twin Helix Muon Cooling Channel
  Muon colliders have been proposed for the next generation of particle accelerators that study high-energy physics at the energy and intensity frontiers. In this paper we study a possible implementation of muon ionization cooling, Parametric-resonance Ionization Cooling (PIC), in the twin helix channel. The resonant cooling method of PIC offers the potential to reduce emittance beyond that achievable with ionization cooling with ordinary magnetic focusing. We examine optimization of a variety of parameters, study the nonlinear dynamics in the twin helix channel and consider possible methods of aberration correction. 
J.A. Maloney, V.S. Morozov, Ya. S. Derbenev, A. Afanasev, R.P.   Johnson, C.A. Ankenbrandt, C. Yoshikawa, K. Yonehara, D. Ne...
physics.acc-ph