Design of high-speed electron beam scanning system based on Helmholtz coil

基于Helmholtz线圈的电子束高速扫描系统设计 Design of high-speed electron beam scanning system based on Helmholtz coil 张伟 ZHANG Wei 1 first-author 蒋布辉 JIANG Buhui 1 陈晓 CHEN Xiao 2 corresp chenxiaoami@126.com 栗琪凯 LI Qikai 1 孔令其 KONG Lingqi 1 北京航空航天大学机械工程及自动化学院 北京航空航天大学机械工程及自动化学院 School of Mechanical Engineering & Automation of BeiHang University School of Mechanical Engineering & Automation of BeiHang University 军事科学院系统工程研究院军需工程技术研究所 军事科学院系统工程研究院军需工程技术研究所 The Quartermaster Engineering and Technology Research Institute,Institute of System Engineering,.,PLA,AMS The Quartermaster Engineering and Technology Research Institute,Institute of System Engineering,.,PLA,AMS 针对国内电子束偏转扫描线圈的磁感应强度较低、均匀性较差,扫描速度较慢等不足,基于Helmholtz线圈的工作原理,采用空心结构设计了电子束偏转扫描线圈;提出一种双逆推主电路拓扑结构,使扫描线圈的驱动电压增加一倍,从而提高了扫描线圈驱动电流的变化速度;采用电流霍尔传感器和PID调节电路设计了驱动电流闭环控制电路,并利用Labview软件开发了电子束高速扫描控制程序。结果表明:该电子束高速扫描系统扫描线圈的磁感应强度和均匀性能够满足大角度电子束偏转扫描要求,并有效提高驱动电流的变化速率,可以实现电子束高速扫描。 Aiming at the disadvantages of domestic electron beam deflection scanning coils such as low magnetic field strength,poor uniformity,and slow scanning speed,based on the working principle of the Helmholtz coil,the electron beam deflection scanning coil is designed with a hollow structure.The circuit topology of push and pull of output voltage is proposed,which doubles the driving voltage of the scanning coil,thereby increasing the speed of change of the driving current of the scanning coil. The current Hall sensor and PID adjustment circuit are used to design the driving current closed-loop control circuit,and the Lab View software is used to develop the electron beam high-speed scanning control program. The results show that the magnetic field intensity and uniformity of the scanning coil of the electron beam high-speed scanning system can meet the requirements of large-angle electron beam deflection scanning. The optimized design of the scanning coil drive circuit effectively increases the rate of change of the driving current and can realize high-speed electron beam scanning. 电子束 高速扫描 偏转线圈 驱动电路 electron beam high-speed scanning deflection scanning coil drive circuit TG43 国家重点研发计划（2017YFB1103101）;国家自然科学基金（51975036）;航空科学基金（20200054051001） 2022-03-08 6 51