Conceptual design of compact synchrotron for carbon ion therapy

Hitachi has been developing the proton beam therapy system using scanning irradiation method. On the other hand, recently, the needs of carbon therapy system have been rising with its dose concentration and biological effect. Hence, we have carried out the conceptual design of compact carbon synchrotron based on the technologies of proton therapy system. The circumference of this synchrotron is about 50 m but this synchrotron is applicable to the maximum energy of 430 MeV/u because of realization of 30 cm range in water. In this paper, the overview of optics design of this synchrotron is described. (author)