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

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.