DESIGN OF SYNCHROTRON AT NIRS FOR CARBON THERAPY FACILITY

Based on 10 years experience of carbon therapy at HIMAC, the conceptual design of the carbon therapy accelerator facility has been carried out in order to provide such beneficial treatment around Japan. It is required for the synchrotron to accelerate carbon ions from 4 MeV/u of injection energy to 400 MeV/u corresponding to the 275 mm range in water. In the design of the synchrotron, the radius of 10 m and the dipole-magnet filling factor of 43 % are achieved with FODO lattice structure. In this paper, the conceptual design of the synchrotron dedicated to carbon therapy is presented.