偏转磁场场参数的理论分析与计算

偏转磁场的场参数H₀,H₂,H₄常用来表示偏转系统的电子光学性质。本文从毕奥-沙伐定律出发,先得出单匝喇叭状鞍形线圈场参数的解析表达式,接着运用傅里叶谐波分析法求出当线匝具有某种分布时的场参数的解析表达式,从而建立谐波分量与场参数的直接关系,并得出一些有用的结果。可用于显象管、摄象管、雷达显示管、扫描电子显微镜、电子束曝光机等的偏转线圈设计。 关键词：

THE THEORETICAL ANLYSIS AND CALCULATION ON THE PARAMETERS OF MAGNETIC DEFLECTION FIELDS

The electron optical properties of magnetic deflection systems are generally described in terms of the parameters H₀, H₂ and H₄. In this paper, basing on the Biot-Savart's law, we derive the analytical formulas for the flaring saddle coil with a single turn. And then using the method of Fourier harmonic anlysis we obtain the field-para-meters experssions for the different winding distributions. So the relations between the field-parameters and the harmonics and some useful results are obtained. These formulae are useful for designers of deflection systems in television tubes, kinescopes, radars, scanning electron microscopes and electron beam exposure equipments.