上海光源储存环轨道噪声分析
Orbit noise analysis in Shanghai Synchrotron Radiation Facility storage ring
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摘要: 利用上海光源束流位置测量系统Libera电子学对储存环轨道数据进行了测量，分析了Libera对束流位置测量系统探头信号的处理过程，应用MATLAB软件对数据进行了处理，采用Welch方法对轨道噪声数据进行了功率谱和积分功率谱分析，获得了主要噪声源的相关信息，为消除噪声、提高轨道稳定性提供了依据。实验结果表明：在储存环的不同位置，噪声功率谱的结构具有相似性；尽管不同频段噪声对功率谱影响不同，但是噪声源主要来自于低频段的地基振动、支架共振和磁铁电源。Abstract: The analysis of power density spectrum (PDS) and integral PDS has been implemented for orbit noise analysis in the Shanghai Synchrotron Radiation Facility(SSRF) storage ring. The beam position monitor signal processing in Liberas, which are the orbit measurement electronics, and the PDS calculation algorithm (Welch method) are described in this paper. Then the measured orbit noise PDS and integral PDS are presented. The result indicates that the main orbit noise sources are ground vibration, girder resonant vibration and 50 Hz power supply noise. The orbit noise analysis is useful to reduce orbit noise and increase orbit stability.
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