Methods of measurement for the beam-based alignment System in HLS

作     者：CAO Yong SUN Bao-Gen LU Ping 

作者机构：National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2005年第16卷第6期

页      面：321-324页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：SupportedbyNationalNaturalScienceFoundationofChina(10275062) 

主　　题：高能加速器 HLS BPM 四极 轨迹监测 

摘      要：The beam-based alignment system is given in HLS (Hefei Light Source), in which a switchable shunt resistorwas installed on quadrupole to bypass a small percentage of the magnet current. The system can measureBPM-to-quadrupole offset which can be used to position the beam in the magnetic center of quadrupoles. In measurement,some methods ( linear fitting with single corrector, parabola fitting with single corrector, linear fitting withlocal bump, and parabola fitting with local bump ) are used. These measurement results are given, and comparedamong the methods mentioned above.