Physics design of a 70MeV high intensity cyclotron, CYCIAE-70

This paper introduces the physics design of a 70MeV high intensity cyclotron at China Institute of Atomic Energy (CIAE), which is aimed for multiple uses including radioactive ion-beam (RIB) production. The machine adopts a compact structure of four straight sectors, capable of accelerating two kinds of beams, i.e. H− and D− . The proton and deuteron beam will be extracted in dual opposite directions by charge exchange stripping devices. The energy of the extracted proton beam is in the range 35–70MeV with an intensity up to 700μA. The corresponding values for the deuteron beam are 18–33MeV and 40μA. This paper will present the main characteristics and parameters in the design of the 70MeV cyclotron, the results of the basic beam dynamics study, as well as the physics in the design of the different systems, including the main magnet, RF, injection and extraction systems, etc.