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Persistent URL http://purl.org/net/epubs/work/17874752
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Record Id 17874752
Title A 30-350 MeV Normal-Conducting Scaling FFAG for Proton Therapy
Abstract In this paper we present a new lattice design for a 30 - 350 MeV scaling FFAG accelerator for proton therapy and tomography - NORMA (NOrmal-conducting Racetrack Medical Accelerator). The energy rang allows the realisation of proton computed tomography (pCT) and utilises normal conducting magnets in both a conventional circular ring and a novel racetrack configuration which are both designed using advanced optimisation algorithms we have developed in PyZgoubi. Both configurations consist of ten FDF triplet cells and operate in the second stability region of Hills equation. The ring configuration has an average circumference of 60 m, a peak magnetic field of < 1.6 T, an average orbit excursion of 43 cm and a dynamic aperture of 68 mm.mrad - determined using a novel DA calculation technique. The racetrack configuration is realised by adding magnet- free drift space in between cells at two opposing points in the ring, to facilitate injection and extraction. Our racetrack design has a total magnet-free straight lengths of 4.9 m, an average circumference of 71 m, a peak magnetic field of < 1.74 T, an average orbit excursion of 49 cm and a DA of 58 mm.mrad. A transverse magnet misalignment model is also presented for the ring and racetrack configurations where the DA remains above 40 mm.mrad for random misalignment error distributions of width 100 um.
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Language English (EN)
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Journal Article Phys Rev Spec Top-Ac (2015). 2015