高重复频率传输线结构冲击磁铁仿真分析  

Analysis based on simulation of kicker working at high repetition frequency with transmission line structure

作　　者：王东兴 韩波 武万锋 黄毛毛 朱燕燕 Wang Dongxing;Han Bo;Wu Wanfeng;Huang Maomao;Zhu Yanyan(Institute of Advanced Science Facilities,Shenzhen 518107,China;Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China)

机构地区：[1]深圳综合粒子设施研究院,广东深圳518107 [2]中国科学院上海高等研究院,上海201204

出　　处：《强激光与粒子束》2025年第3期94-101,共8页High Power Laser and Particle Beams

摘　　要：深圳中能高重复频率X射线自由电子激光(S3FEL)需要MHz的高重复频率高稳定性冲击磁铁(Kicker)系统,传输线结构冲击磁铁系统是实现高重复频率的有效途径。但传输线结构冲击磁铁的波形稳定性不足限制了该类型冲击磁铁在大型粒子加速器中的应用。为改善上述不足,基于传输线结构冲击磁铁的输入波形和电路结构参数开展了研究,利用傅里叶分析等数学工具分析了影响冲击磁铁工作波形稳定性的主要因素,揭示了冲击磁铁理想波形的谐波次数与传输线结构冲击磁铁截止频率之间的关系。在此基础上,提出一种减小冲击磁铁实际波形与理想波形偏差的方法。该方法通过调整冲击磁铁输入波形参数或者传输线结构冲击磁铁截止频率,在一定范围内可以获得冲击磁铁理想的工作波形。为验证上述关系,用电路仿真软件对冲击磁铁不同工作波形和不同电路参数进行了仿真。仿真结果证实了上述关系且验证了所提方法的有效性。Shenzhen’s medium-energy high-repetition-rate X-ray free electron laser(Shenzhen Superconducting Soft X-ray Free Electron Laser,S3FEL)requires 1 MHz high-repetition-rate and high-stability kicker.Transmission line structure kicker is an effective way to achieve high repetition rate.However,the insufficient waveform stability of the transmission line structure kicker limits the application of this type of kicker in large particle accelerators.To solve the above problem,this paper studies the input waveform and circuit structure parameters of the transmission line structure kicker.It analyzes the main factors affecting the stability of kicker’s working waveform using mathematical tools such as Fourier analysis,and reveals the relationship between the harmonic order of kicker ideal waveform and the cut-off frequency of kicker transmission line structure.On this basis,this paper proposes a method to reduce the deviation between the actual waveform and the ideal waveform of kicker.This method can obtain the ideal working waveform of kicker within a certain range by adjusting the input waveform parameters or the cut-off frequency of kicker.To verify the above relationship,this paper uses circuit simulation software to simulate different waveforms and different circuit parameters of kicker.The simulation results verify that the above relationship revealed and confirm the effectiveness of the method mentioned.

关 键 词：传输线结构 冲击磁铁 高重复频率 傅里叶级数 截止频率 

分 类 号：TL503.3[核科学技术—核技术及应用] TL503.5