多束团模式下束流位置频谱模型及参数获取算法 |
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引用本文: | 杨勇,冷用斌,王宝鹏. 多束团模式下束流位置频谱模型及参数获取算法[J]. 强激光与粒子束, 2014, 26(8): 085103. DOI: 10.11884/HPLPB201426.085103 |
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作者姓名: | 杨勇 冷用斌 王宝鹏 |
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作者单位: | 1.中国科学院 上海应用物理研究所, 上海 201 800; |
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基金项目: | 国家自然科学基金项目(11075198) |
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摘 要: | 以储存环逐圈位置频谱模型为基础,通过一些假设条件推导出多束团模式下束流位置的频谱模型。利用上海光源储存环受激多束团位置信号频谱数据,使用遗传算法进行多曲线数据拟合得到模型参数。结果表明:在迭代100次的条件下,该模型与原数据所有曲线的相关性均在95%以上,并且可以精确估计多束团频谱曲线的双峰分裂。曲线拟合后的参数可以监测储存环阻抗的变化。
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关 键 词: | 多束团 频谱模型 遗传算法 多曲线拟合 阻抗 |
收稿时间: | 2013-12-14 |
Spectrum of multi-bunch beam position model and parameter acquisition algorithm |
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Affiliation: | 1.Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;2.University of Chinese Academy of Sciences,Beijing 100049,China |
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Abstract: | Based on the spectrum of turn-by-turn model for the storage ring, spectrum of multi-bunch beam position model was derived through some assumptions. Spectrum of excited electron beam position was analyzed at Shanghai Synchrotron Radiation Facility(SSRF) and Genetic Algorithm was used to fit multi-curve data and the model parameters were obtained. The results show that, after 100 times iteration, all the correlation of fitted data and original data can be up to 95%, and the model can accurately estimate a bimodal split of the spectrum curve. The parameters can be used for monitoring the impedance of the storage ring. |
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Keywords: | multi-bunch spectrum model genetic algorithm multiple curve fitting impedance |
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