纯永磁波荡器基波与谐波磁场的三维计算与测试  

Fundamental and harmonic induction fields in PPM undulator

作　　者：李格[1] 张鹏飞[1] 陈念[1] 何多慧[1] 周银贵[1] 张杨[1] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,安徽合肥230026

出　　处：《强激光与粒子束》2004年第1期105-108,共4页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题;国家基础研究重大项目前期预研专项基金资助课题(2001CCB01000);高校"211"工程资助课题;安徽省自然科学基金资助课题(01046202);高校博士点97035822等项目资助课题

摘　　要：　对标淮的纯永磁波荡器进行了三维磁场的有限元计算,给出了纯永磁波荡器的基波与谐波磁场的幅值与相位,并与测试结果进行对比,结果表明,标准的纯永磁波荡器谐波磁场幅值比基波幅值低两个数量级。The standard pure permanent magnet (PPM) undulator has been analyzed by 3-dimensional electromagnetic computation software, the Modeller in Opera3D. The amplitude and phase angle of fundamental and harmonic induction fields in it are given for different air gaps. They show that all harmonic induction fields in standard PPM undulator are two orders lower than their fundamental induction field. This conclusion is verified by the related magnetic measurements to one standard PPM undulator in optical klystron with 0.5mm×1mm Hall probe. The paper also presents comparisons between theoretic results with analysis equation as well as 3D Finite Element computations and magnetic measurement with hall probe. In furthermore, inserted very small airgaps along beam direction in PPM undulator, leaving space for shimming optimization, are conducive to better radiation performance.

关 键 词：纯永磁波荡器 三维磁场计算 基波与谐波磁场 

分 类 号：TL506[核科学技术—核技术及应用]