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Innovative Concepts of Dual-Species Proton/Carbon Medical Synchrotrons


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Abstract


Hospital-based facilities offering treatments with low-LET and high-LET particles delivered by a common particle accelerator (LET = Linear Energy Transfer) are one of the recent trends in ion therapy. Protons and carbon ions are considered to be the best particle species for low-LET and high-LET treatments, respectively. Innovative concepts of proton/carbon medical synchrotrons based on the acceleration of molecular hydrogen ions for generation of protons are presented in the paper. These concepts do not compromise the medical requirements, but they are expected to bring several major advantages concerning the design, operation and cost of the accelerator: (1) shrinking the overall magnetic beam rigidity span of extracted beams, (2) reducing the space charge of a hydrogen beam at the injection, (3) a compact dual-species injector layout and (4) making a charge-exchange extraction technique at FFAG (Fixed Field Alternating Gradient) synchrotrons possible. Further potential advantages concern the power supplies (especially the ripple), field quality of the bending magnets and time structure of the extracted spills.
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Keywords


FFAG; Ion Therapy; Medical Accelerator; Synchrotron

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References


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