详细推论了高斯分布的轴对称电子束的截断方法和确定截断因子的表达式。
The cut method for Gussian beam having axisymmetry is discussed in detail and the expression for the cut factor is defined in this paper.
功率密度的二阶矩方法可用于截断光束，并克服了光束质量因子的发散困难。
It is also shown that the second-order moment method of the power density is applicable to the truncated beams and overcomes the divergence difficulty of the beam quality factor.
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