动力吸振器在反射镜角度振动抑制上的应用  

Application of dynamic vibration absorber on mirror angular vibration suppression

作　　者：袁浩然 何世靖 吴天宇 陈诺 王之卓 欧阳峥嵘 刘芳 YUAN Haoran;HE Shijing;WU Tianyu;CHEN Nuo;WANG Zhizhuo;OUYANG Zhengrong;LIU Fang(ShanghaiTech University,Shanghai 201210,China)

机构地区：[1]上海科技大学,上海201210

出　　处：《核技术》2025年第3期54-59,共6页Nuclear Techniques

摘　　要：上海硬X射线自由电子激光装置X光束传输距离超过1 km,反射镜的角度振动对实验站样品处的光斑影响很大。本文旨在探讨动力吸振器在减小反射镜角度振动的可行性。针对反射镜角度14.6 Hz的环境振动,设计了一个可变刚度的动力吸振器,将其应用于上海硬X射线自由电子激光装置的反射镜调节系统中,以期实现该频率的振动抑制。实验结果表明,通过将动力吸振器的频率调至14.6 Hz,反射镜调节系统14.6 Hz的振动从154 nrad降低至27.9 nrad,其他频率的振动基本无明显变化,整体反射镜角度的振动从193.2 nrad降低至76.9 nrad。该结果表明动力吸振器能够有效降低反射镜调节机构在特定频率的角度振动,为先进X射线光源的角度振动控制提供了一种新的解决方案。[Background]The length of the photon beam transportation of Shanghai High repetitioN rate XFEL and Extreme light facility(SHINE)exceeds 1 km,the angular vibration of reflecting mirrors would be magnified at the endstations due to the long-distance transportation.[Purpose]This study aims to explore the possibility of suppressing the angular vibration by using a dynamic vibration absorber.[Methods]According to the big pitch angular vibration of the mirror system at 14.6 Hz,a dynamic vibration absorber was designed with variable stiffness aiming at suppressing the vibration of mirror system for SHINE.[Results]By tuning the nature frequency of the dynamic vibration absorber designed in this study at 14.6 Hz,results show that the vibration of reflecting mirrors at 14.6 Hz is reduced from 154 nard to 27.9 nrad,while vibrations at other frequencies are not disturbed,the total vibration is improved from 193.2 nrad to 76.9 nrad.[Conclusions]This indicated that the certain angular vibration of the mirror system could be suppressed by dynamic vibration absorber,which provided a new solution for angular vibration control of the advanced X ray light sources.

关 键 词：动力吸振器 振动 光束稳定性 自由电子激光 

分 类 号：TL99[核科学技术—核技术及应用]