强流电子枪近阴极发射面区的分析与计算

近阴极发射面区的分析与计算是强流电子枪计算过程的一个关键环节．文中提出了该区在温度限制下交叉电磁场空间电荷流的理论分析，与Ｋｉｎｏ短枪流理论相结合，可以对交叉电磁场空间电荷流进行完整的计算．在此基础上研制的Ｃ形带状强流电子枪计算软件包已用于实际电子枪的计算，计算结果与实测一致

Analysis and Calculations of the Region Quite Close to Cathode Emission Surface in High Current Electron Gun

In a high current electron gun, the computation of the region quite close to a ca thode emission surface is the key to the computation of electron beams. In this paper, the theoretical analysis and computation methods for space charge flows under two limitations in the crossed electric magnetic field are provided. Under the temperature limitation, the analysis and computation formulas of the space charge flow in the crossed electric magnetic field are presented. In computing the space charge flow under the space charge limitation, Kino short gun theorem and its formulas are used. The computation methods and the program chart are presented. The computation software for a C shaped strip high current electron gun has been applied to a practical design successfully. The computational results are consistent with the measurement data.