紧凑型医用回旋加速器的物理设计

Physics design of a compact medical cyclotron

介绍了能量11 MeV、流强50μA的紧凑型质子医用回旋加速器的物理设计方案,并较详细报告了各主要分系统(包括离子源、磁铁、高频、中心区、引出系统)的设计方法及结果。该加速器已经完成调试,成功引出平均流强50μA、能量11 MeV的质子束流,验证了整机物理设计的正确性。

Background： A compact cyclotron with energy of 11 MeV and current of 50 μA is under construction in Institute of Fluid Physics of China Academy of Engineering Physics. The compact cyclotron is developed for medical isotope production. Purpose： To minimize the cost and to shorten the time of the development of the compact cyclotron, a lot of efforts were dedicated to the physics design of the compact cyclotron. Methods： Physics design of the main magnet was performed using TOSCA software, and start-to-end beam dynamics design was performed using home-made software CYCDYN. Results： Physics design of the compact cyclotron was given in details. Design methods and results of the main subsystems （including ion source, radial sector focusing magnet, RF cavity, central region and extraction system） were also given in this paper. Conclusion： Now commissioning of this cyclotron has been finished, and the goal for extracting proton beams of 11 MeV and 50 p^A on average has been achieved. Physics design of the cyclotron has been validated by the commissioning results.