对电子束聚焦中空间电荷效应的解析

Analysis of space charge effect in electron beams focusing

介绍了空间焊接中空间电荷效应对空间电子束聚焦的影响,提出了计算电子枪主透镜区空间电荷密度的流管法和计算机辅助设计方法.通过编程计算表明这种计算方法是可行的,从而为设计空间电子束焊枪的电聚焦系统提供了理论依据.

The influence of space charge effect on electron beam focusing in space welding is introduced. Then the stream tube method used to calculate the density of space charge in the area of main leas of electron gun and its computer aided design (CAD) method are put forward. The result of calculation shows that the method is feasible and provides a theoretical basis for the design of focusing system of electron gun for space electron beam welding.