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偏转磁场的偏转特性可由场参数H_0、H_2和H_4求出。它们只是轴上坐标Z的函数。本文进一步算出了几种典型分布的场参数并分析了其变化规律。具体内容有: 1.求出导线按余弦函数的任意次幂分布(即n(θ)cos~m θ)的场参数。为此首先计算了归一化傅里叶谐波系数,进而求得归一化的场系数。其中,幂指数m从0到5.0共取了36个数值,m=0即均匀分布。经计算得到了场参数H_0随m增大而单调增大的规律,H_2则由m=0时的负值逐渐增大至正值,即逐渐由桶形场变为枕形场。 2.导线均匀分布但覆盖角不同时的场参数(如0°～30°、0°～60°、0°～90°、30°～60°、60°～90°等)。覆盖角越小,
The deflection characteristics of the deflection magnetic field can be obtained from the field parameters H_0, H_2 and H_4. They are only a function of the axis coordinate Z. This paper further calculated several typical distribution of field parameters and analysis of the variation. The details are as follows: 1. Find the field parameters of an arbitrary power distribution (that is, n (θ) cos ~ m θ) of the cosine function. For this purpose, the normalized Fourier harmonic coefficients are calculated first, and the normalized field coefficients are obtained. Among them, the power index m from 0 to 5.0 total of 36 values, m = 0 that is evenly distributed. The law that the field parameter H_0 increases monotonously with m increases is calculated, and the value of H_2 increases from negative value at m = 0 to positive value, that is, it gradually changes from barrel field to pincushion field. 2. The field parameters (such as 0 ° ~ 30 °, 0 ° ~ 60 °, 0 ° ~ 90 °, 30 ° ~ 60 °, 60 ° ~ 90 °, etc.) with uniform wire distribution and different coverage angles. The smaller the coverage angle,