• Y. Jongen, M. Abs, A. Blondin, W. Kleeven, S. Zaremba, D. Vandeplassche
  IBA, Louvain-la-Neuve
• V. Alexandrov, S. Gursky, G. Karamysheva, N. Kazarinov, S. Kostromin, N. Morozov, V. Romanov, N. Rybakov, A. Samartsev, E. Samsonov, G. Shirkov, V. Shvetsov, E. Syresin, A. Tuzikov
  JINR, Dubna

Carbon therapy is most effective method to treat the resistant tumors. A compact superconducting isochronous cyclotron C400 has been designed by IBA-JINR collaboration. This cyclotron will be used for radiotherapy with proton, helium and carbon ions. The ¹²C⁶⁺ and ⁴He²⁺ ions will be accelerated to the energy of 400 MeV/amu and will be extracted by electrostatic deflector, H₂⁺ ions will be accelerated to the energy 265 MeV/amu and protons will be extracted by stripping. The magnet yoke has a diameter of 6.6 m, the total weight of the magnet is about 700 t. The designed magnetic field corresponds to 4.5 T in the hills and 2.45 T in the valleys. Superconducting coils will be enclosed in a cryostat; all other parts will be warm. Three external ion sources will be mounted on the switching magnet on the injection line located bellow of the cyclotron. The main parameters of the cyclotron, its design, the current status of development work on the cyclotron systems and simulations of beam dynamic will be presented.