Commercial accelerators. Compact superconducting synchrotrons at magnetic field level of up to 10 T for proton and carbon therapy

Based on a brief analysis of accelerators widely used for proton-ion therapy and patient cure during the last 20 years, the feasibility and importance of compact superconducting synchrocyclotrons operating at magnetic field level up to 10 T are outlined. The main component of modern commercial facility for proton-ion therapy is an isochronous cyclotron with room temperature or superconducting coils accelerating protons up to 250 MeV as well as a synchrotron accelerating carbon ions up to 400 MeV/A. Usually ions are delivered from accelerator into the treatment room by transport lines. Irradiation is done by a system of pointed to the patient magnets, collimators, energy degraders which are attached to the rotating Gantry. To greatly reduce the price of facility (almost by one order of magnitude) and to simplify operational conditions of hospital personnel, it is proposed to provide isocentric rotation of compact superconducting synchrocyclotron around the patient. Main physical and technical parameters are described in the paper