计算电子光学系统收集效率的蒙特卡洛数值积分法

本文提出了一种非决定性的蒙特卡洛法同计算真空中电子轨迹的决定性的数值积分法相结合的蒙特卡洛数值积分法,用以模拟电子在电子光学系统中运动的全过程,计算打拿极(或阳极)对电子的收集效率,探讨电子发射角和初能量分布的影响。以研制中的陶瓷通导式光电倍增管为例进行了实际计算,讨论了本方法的局限性以及进一步开拓的问题。

A NEW METHOD-MONTE CARLO-NUMERICAL INTEGRATIONMETHOD FOR COMPUTING COLLECTION-EFFICIENCYOF AN ELECTRON OPTICAL SYSTEM

A new method that combines Monte-Carlo method with the numerical integration method used for computing electron trajectories in vacuum to calculate the electron collection efficiency of the anode (or dynode) of an electron optical system is presented. This method can simulate the whole process of electron motion in a system. Taking the microchannel plate photomultiplier as an example, the collection efficiency is calculated, the influences of the distributions of electron emitting angles and energies are studied, and the limitation and extension of this method are discussed.