The Advancement of Cooling Absorbers in COSY INFINITY
AbstractCOSY Infinity is an arbitrary-order beam dynamics simulation and analysis code.
It can determine high-order transfer maps of combinations of particle optical
elements of arbitrary field configurations. For precision modeling, design, and
optimization of next-generation muon beam facilities, its features make it a
very attractive code. New features are being developed for inclusion in COSY to
follow the distribution of charged particles through matter. To study in detail
some of the properties of muons passing 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 average behavior of the particles in
the accelerator channel including energy loss, and Monte-Carlo methods are used
to provide small corrections to the predictions of the transfer map accounting
for the stochastic nature of scattering and straggling of particles. The
advantage of the new approach is that it is very efficient in that the vast
majority of the dynamics is represented by fast application of the high-order
transfer map of an entire element and accumulated stochastic effects as well as
possible particle decay. The gains in speed are expected to simplify the
optimization of muon cooling channels which are usually very computationally
demanding due to the need to repeatedly run large numbers of particles through
large numbers of configurations. Progress on the development of the required
algorithms is reported.
J. Kunz, P. Snopok, M. Berz, K. Makino,
in: 6th International Particle Accelerator Conference, (2015) 2655
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