波荡器永磁系统的计算机仿真计算

The Computer Simulation for Undulator Permanent Magnetic System

用Ansys有限元软件对波荡器永磁系统进行仿真计算,仿真对象包括二周期、三周期非渐变结构和简易渐变结构。给出了系统的磁力线分布和磁场分布,结果显示,与非渐变结构相比,在相同的工作间隙和永磁材料用量的前提下,简单渐变结构系统的场强提高了40%左右,而高次谐波及漏场则可显著减小。仿真结果为波荡器的设计提供了有益参考。

Ansys finite element software was used for the simulation of undulator permanent magnet system, including two, three-periodic non-gradual structure and simple gradual structure. The distribution of magnetic force line and magnetic field of the systems was given. It shows that, compared to the non-gradual structure, the field strength of the system with sample gradual structure increases by 40%, and higher harmonics and flux leakage decrease greatly, for the same air gap and the amount of magnets used. The simulation supplies useful consultation to the design of undulator.