针对强流脉冲电子束二极管金属表面涡流引起的器件内部磁场分布不均、电子束辐照材料表面处理效果不佳等现象, 提出了多板钢联接式内壁与玻璃外壁相结合的双层结构设计。基于有限元仿真软件对电子束系统的磁场与涡流进行了数值计算, 分析了涡流的影响因素和涡流对于电子束源磁场的影响。通过数值计算表明, 设计的新型介质壁结构能有效降低涡流对于电子束的影响。该分析为消除感应涡流对真空二极管内部磁场的影响提供了理论依据, 具有良好的参考价值。

In view of the uneven distribution of magnetic field in the devices caused by the metal surface eddy current in the high-current pulse electron beam diode, the surface treatment effect of the electron beam irradiated material is not good, and the double structure design of the multi plate steel connecting inner wall with the glass outer wall is proposed. Based on the finite element simulation software, the magnetic field and eddy current of the electron beam system are numerically calculated. The influence factors of the eddy current and the influence of the eddy current on the magnetic field of the electron beam source are analyzed. The result shows that the design of the new dielectric wall structure can effectively reduce the effect of eddy current on the electron beam. The analysis provides a theoretical basis for eliminating the influence of induction eddy current on the magnetic field of diode.