Study of closed orbit response to magnet vibrations at the SSRF storage ring

• Published in: Chinese physics C Vol. 32; no. 7; pp. 589 - 592
• Main Author: 陈建辉 赵振堂 戴志敏 刘桂民
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.07.2008; Shanghai Institute of Applied Physics, CAS, Shanghai 201800, China
• Subjects: 响应函数; 核物理学; 电子回旋加速器; 磁振动; 闭轨道畸变; betatron wavelength; magnet vibrations; response function; girder local correlation compensa-tion effect; closed orbit distortion
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/32/7/016

This paper presents the analytical and simulation responses of the closed orbit distortion in the SSRF storage ring to random and plane wave like magnet vibrations respectively. It is shown that the use of girder is very beneficial in the view of suppressing this response function. Effect of the independently supported gradient bending magnets to the closed orbit response is given. An analytic formula is written to give a rough estimate of the closed orbit distortion due to ground motion, taking into account the closed orbit response function and girder transfer function. As an example, the result of SSRF case is given.