Conceptual design of a non-scaling fixed field alternating gradient accelerator for protons and carbon ions for charged particle therapy

K. J. Peach, M. Aslaninejad, R. J. Barlow, C. D. Beard, N. Bliss, J. H. Cobb, M. J. Easton, T. R. Edgecock, R. Fenning, I. S. K. Gardner, M. A. Hill, H. L. Owen, C. J. Johnstone, B. Jones, T. Jones, D. J. Kelliher, A. Khan, S. Machida, P. A. McIntosh, S. Pattalwar, J. Pasternak, J. Pozimski, C. R. Prior, J. Rochford, C. T. Rogers, R. Seviour, S. L. Sheehy, S. L. Smith, J. Strachan, S. Tygier, B. Vojnovic, P. Wilson, H. Witte, T. Yokoi

The conceptual design is presented for a particle accelerator for medical applications (PAMELA), an accelerator facility to deliver protons and carbon ions efficiently for charged particle therapy (CPT). The design uses the novel features of nonscaling fixed field alternating gradient (nsFFAG) technology to improve performance over existing facilities. The fixed field allows more rapid acceleration than is possible with a synchrotron (kHz rather than Hz) while still allowing variable energy extraction from 70 to 250 MeV for protons, and 110 to 440 MeV/u for carbon, with excellent dose control and fast transverse scanning. This should result in greater patient throughput owing to shorter treatment durations and perhaps fewer treatment sessions (fractions), and eventually lower cost.

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