变象管电子光学特性的研究

借助于电阻网模拟和数值计算,对电聚焦二极式平面阴极变象管的电场分布和电子光学特性作了精密的确定。结果表明,沿轴电位分布可以用经验公式φ=Asinh kz表示,并且求得了系数A,k,高斯象面位置和放大率等参量与极间距离的关系曲线。推导出计算畸变的近似式;实际量测表明,该近似式具有颇高的准确度。对电极系统的设计问题作了讨论。

THE ELECTRON-OPTICAL PROPERTIES OF IMAGE CONVERTER

The field distribution and electron-optical properties of electrostatically-focused image converter with plane cathode are precisely determined by means of resistance network analogue and numerical computation. The axial potential distribution is found to be expressible by the empirical formula φ = A sinh kz. Graphs are given, showing the dependence of coefficients A, k, the position of Gauss-image-plane, and linear magnification on inter-electrode spacing. An approximate formula for calculating distortion-coefficient is derived, which agrees fairly well with experimental result. Design factors are discussed.