利用约束线性最小二乘法实现合肥光源束流闭轨全环校正和反馈  

Beam closed orbit correction and feedback by constrained linear least squares method in Hefei light source

作　　者：宣科[1] 王琳[1] 李川[1] 李为民[1] 王季刚[1] 鲍循[1] 徐宏亮[1] 刘功发[1] 刘祖平[1] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,合肥230029

出　　处：《强激光与粒子束》2010年第1期155-158,共4页High Power Laser and Particle Beams

基　　金：中国科学技术大学青年科学基金(KY2310000006)

摘　　要：由于存在各种非理想因素,束流在储存环中的闭轨会发生畸变。对束流闭轨畸变进行校正的方法较多,目前合肥光源(HLS)采用奇异值分解(SVD)法进行束流闭轨的全环校正和反馈。针对SVD法不足之处,采用约束线性最小二乘法(CLLS)来改进HLS束流闭轨的全环校正和反馈。介绍了束流闭轨畸变校正的理论,着重介绍应用CLLS对HLS储存环束流闭轨畸变进行全环校正和反馈,并给出运行结果。结果显示,利用CLLS后,HLS敏感实验线站的束流轨道稳定性和重复性得到明显改善。There are always closed orbit distortions and closed orbit shifts produced by various error sources. They are detrimental to beam performance and must be corrected by closed orbit correction and orbit feedback system. Singular value decomposition（SVD） method is currently being used in the closed orbit correction and feedback system in Hefei light source. In this article, the mathematical algorithms for orbit correction and feedback are introduced, especially constrained linear least squares method（CLLS）. Compared with SVD method, CLLS method pays more attention to sensitive position. Running results using this method are given, and they show that the orbit reproducibility and beam orbit stability of special sensitive beamline is improved significantly.

关 键 词：束流闭轨畸变 约束线性最小二乘法 响应矩阵 全环校正 

分 类 号：TL503[核科学技术—核技术及应用]