多束团模式下束流位置频谱模型及参数获取算法  

Spectrum of multi-bunch beam position model and parameter acquisition algorithm

作　　者：杨勇[1,2] 冷用斌[1] 王宝鹏[1,2] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《强激光与粒子束》2014年第8期291-295,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11075198)

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。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 Radia- tion 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 accu- rately estimate a bimodal split of the spectrum curve. The parameters can he used for monitoring the impedance of the storage ring.

关 键 词：多束团 频谱模型 遗传算法 多曲线拟合 阻抗 

分 类 号：TL506[核科学技术—核技术及应用]