Hybrid Methods for Muon Accelerator Simulations with Ionization Cooling
AbstractMuon ionization cooling involves passing particles through solid or liquid
absorbers. Careful simulations are required to design muon cooling channels.
New features are being developed for inclusion in the transfer map code COSY
Infinity to follow the distribution of charged particles through matter. To
study the passage of muons through material, the transfer map approach alone
is not sufficient. The interplay of beam optics and atomic processes must be
studied by a hybrid transfer map–Monte-Carlo approach in which transfer
map methods describe the deterministic behavior of the particles,
and Monte-Carlo methods are used to provide corrections accounting for the
stochastic nature of scattering and straggling of particles. The advantage
of the new approach is that the vast majority of the dynamics are represented
by fast application of the high-order transfer map of an entire element and
accumulated stochastic effects. The gains in speed are expected to simplify
the optimization of cooling channels which is usually computationally
demanding. Progress on the development of the required algorithms and their
application to modeling muon ionization cooling channels is reported.
J. Kunz, P. Snopok, M. Berz,
in: 12th International Computational Accelerator Physics Conference 2015, (2016) 66
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