一种用于波荡器磁中心高精度标定的磁靶标  

A magnetic landmark for high precision undulator magnetic fiducialization

作　　者：俞成 蒋志强[1] 周巧根[1] Yu Cheng;Jiang Zhiqiang;Zhou Qiaogen(Shanghai Institution of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201204 [2]中国科学院大学,北京100049

出　　处：《强激光与粒子束》2018年第8期142-145,共4页High Power Laser and Particle Beams

基　　金：国家青年自然科学基金项目(11405255)

摘　　要：波荡器磁中心轴的标定是保证自由电子激光装置波荡器安装准直精度的重要前提。介绍了一种利用磁靶标实现波荡器磁中心高精度标定的方法。设计制造了由若干块永磁块组合构成的磁靶标,其能产生一正一斜两个高梯度四极场。测出了两四极场垂直分量的零点位置分布并依此给出了磁靶标的具体使用方法。结果表明:标定后的波荡器磁中心在磁靶标坐标系中水平方向测量精度好于±20μm,垂直方向测量精度好于±2μm。The undulator magnetic fiducialization is an important prerequisite to ensure the undulator segments＇ installation precision of the FEL device.A device called＂magnetic landmark＂was developed to achieve high precision undulator magnetic fiducialization.The landmark consists of several permanent magnets which can generate a normal and a skew quadrupole field with high gradient in two orthogonal directions.Positions of the zero point of the two quadrupole fields＇ horizontal component were measured and the specific use of the landmark is given.The results show that the accuracy of the magnetic center axis of an undulator after fiducialization in the landmark coordinate system is better than ±20μm in the horizontal direction and ±2μm in the vertical direction.

关 键 词：波荡器 磁中心标定 磁靶标 四极场 霍尔探头 

分 类 号：TL505[核科学技术—核技术及应用]