CSNS/RCS引出系统快脉冲冲击磁铁的磁场仿真和结构设计

中国散裂中子源快循环同步加速器引出系统快脉冲冲击磁铁，由分组安装于三个真空箱内的8台磁铁组成。对冲击磁铁进行磁场仿真和结构设计，并使用仿真软件进行优化。仿真结果表明:磁铁中心场60%宽度内的磁场均匀性达到0.7%，满足物理设计要求。同时，对两台磁铁间距大小与互感的关系进行模拟计算和分析。磁铁结构设计中，针对原样机中出现的铁芯不能可靠固定问题，进行修改和完善，并且设计出了一种简单实用的多螺栓滑动支撑结构，可使多台磁铁平稳推入真空箱内，同时完成多台磁铁的准直和固定。

Magnetic field simulation and structure design of fast extraction Kicker for CSNS/RCS

Three kicker assemblies including eight pulsed magnets will be used in the rapid circle synchrotron of China Spallation Neutron Source. Magnetic field simulation and structural design of the kicker magnet is presented. The results of OPERA-3D simulation show that the central field integral of magnets meet the physical requirements by choosing a suitable magnet coil structure. The field uniformity in 60% magnet width is 0.7%. The relation between the distance of two magnets and the mutual inductance are simulated. Compared to the prototype, the magnet structure is modified and improved in design to increase the mechanical stability. A simple and practical design of multi-bolt sliding support structures which is used to push six magnets into the vacuum chamber is introduced.