Speaker
Description
The development of a 100 MeV Spiral-Sector cyclotron, which is capable of extracting a beam with a rated power exceeding 50 kW, is in progress at The China Institute of Atomic Energy. Such a machine is designed for the production of medical radioisotopes for nuclear medicine. The basic parameters of the isochronous cyclotron magnet and its characteristics are described. An isochronous magnetic field was achieved by adopting the upper surface shimming scheme. The spiral angle was adjusted to control the vertical betatron tunes and avoid potentially harmful resonances during acceleration. We performed iterative magnetic field optimization with OPERA-3D, followed by detailed beam dynamics simulations and Lorentz stripping loss analysis. This process ultimately improved the beam acceleration efficiency. Guided by simulated electromagnetic deformation data, the magnet structure was further optimized for weight reduction through an analysis of its stress distribution and magnetization characteristics.
