Iterative solution of the self-consistent problem for electron gun with arbitrary shaped cathode, based on combined finite difference - integral equation approach

摘要

A new approach to solve the self-consistent problem for electron gun with arbitrary-shaped cathode is suggested. The main feautre of the approach is that the most effective numerical techni8ques of charged particle optics, namely finite-difference and integral equation methods for field calculation on the one hand, and direct ray-tracing and aberration analysis for trajectory calculation on the other, are integrated within a versatile iterative procedure.