基于永磁体和螺线圈的径向电子束聚焦系统设计  

Design of radial electron beam focusing system based on permanent magnet and spiral coils

作　　者：李嫒[1] 李相强[1] 孔龙[1] 刘庆想[1] 王少萌[1] 

机构地区：[1]西南交通大学物理科学与技术学院,四川成都610031

出　　处：《磁性材料及器件》2018年第1期35-39,共5页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(11405137)

摘　　要：对一种强流径向电子束浸没式磁聚焦系统进行了研究和设计。首先介绍了浸没式聚焦径向电子束原理和聚焦系统结构,接着仿真研究了在不同磁场分布下浸没式聚焦400 k V/30 k A径向电子束稳定传输的束轨迹,并根据电子束波动情况优化了径向磁场分布,然后设计了基于永磁体和螺线圈混合结构的径向电子束聚焦系统,最后分析了螺线圈绕制方式对聚焦系统的供电系统的影响。结果表明,径向电子束在设计的聚焦系统磁场下能以小波动稳定传输,并且与单线绕制螺线圈相比,双线绕制螺线圈回路脉冲电流前沿更短,脉冲电流宽度更窄,所需电容更小,更有利于径向电子束聚焦系统的小型化。An immersed focusing magnetic system was designed and studied for a high current radial electron beam. Firstly, the principle of immersed focusing for radial beam was introduced and the structure described. Secondly, the stabilized transmission beam trajectories of a 400 kV / 30 kA radial beam under different immersed focusing magnetic fields were studied through simulation, and the radial magnetic field optimized according to the radial electron beam pulsation. Thirdly, a kind of radial beam focusing system based on permanent magnet and spiral coils was designed. Finally, the influence of coil winding mode on the focusing system power supply system was analyzed. The results show that the radial beam can transmit with a small fluctation under the magnetic field generated by the designed focusing system. Besides, compared to single-winding spiral coils circuit, the proposed double-winding spiral coils circuit possesses shorter pulse current front and narrower pulse current width, and lower required capacitance, which are more conducive to the system miniaturization.

关 键 词：微波源 径向电子束 聚焦系统 径向磁场 螺线圈 

分 类 号：TM14[电气工程—电工理论与新技术]