3 years ago

Racetrack Fixed Field Alternating Gradient accelerator for variable energy extraction.

Malek Haj Tahar, David J. Brenner, Gerhard Randers-Pehrson

In this paper, a novel concept of fixed field alternating gradient (FFAG) accelerator is presented which solves the major problems of conventional FFAG and cyclotron accelerators. This concept combines stable racetrack fixed field configuration with dispersion free straight sections to enable variable energy extraction. A time-varying synchrotron-like alternating gradient focusing structure makes it possible for the first time to correct the beam optics of an FFAG accelerator in order to heuristically maximize the beam transmission by minimizing the tune excursion and avoiding the crossing of harmful betatron resonances. This concept makes it possible to design a compact variable energy extraction machine which is particularly useful for research and medical applications such as heavy ion therapy.

Publisher URL: http://arxiv.org/abs/1801.04188

DOI: arXiv:1801.04188v1

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