• E.Antokhin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

• T.Fujisawa, M.Kumada, T.Matsumoto and S.Wakasa
  NIRS, Chiba, Japan

The number of positron emission tomography (PET) centers based on proton cyclotron is rapidly growing nowadays worldwide. It actually requests for simple, reliable and cheap proton cyclotron of energy 10-20 MeV to be designed for mass installations. Normally the magnet system for PET cyclotron is made with iron and copper coils. Although the some optimization of conventional "warm" magnet is possible, the another approach could be the magnet system based on permanent magnet, aiming the cost saving due to no needs of electric power during cyclotron life time. The permanent magnet system for 10 MeV PET cyclotron was designed, manufactured and measured. The present paper describes the cyclotron permanent magnet system as well as beam trajectory analysis in measured magnetic fields and RF system design.

357

• E.Levichev, V.Parkhomchuk, S.Rastigeev, A.Skrinsky, V.Vostrikov
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

• M.Kumada
  NIRS, Chiba, Japan

A carbon ion or proton beams are a superior tool to x-rays in both physical and biological doses in treating a cancer. A carbon beam has an advantage in treating radiation resistant and deep-seated tumors. The main limitation of wide application is a high cost of facility. This problem can be solved by our proton and carbon ion accelerator facility proposal on the base of Cold Beam Synchrotron. The main feature of the facility is an application of electron cooling device. The ion beam is cooled down and the beam emittance and an energy spread are decreased. The final high quality cold ion beam with small transverse emittance and momentum spread allows to decrease significantly the aperture of the synchrotron and components of high energy beam transfer lines.

363