Application of MAFIA in Three-Dimensional Dynamic PIC Simulation of TWT Multistage Depressed Collector
MAFIA在行波管多级降压收集极模拟中的应用

After analyzing the classic 2-D steady-state trajectory method for multistage depressed collectors simulationand design and its limitation, a novel method of full three-dimensional (3-D) dynamic PIC simulation using MAFIA--athree dimensional electromagnetic finite integration code and large signal analysis code is presented. The simplified formula of collector efficiency is also put forward. The process and primary result of this method are described, which shows that the simulation results close to the experimental data within acceptable error range. It is the new approach to accurate simulation and engineering design and optimizing of multistage depressed collectors. Simultaneausly, the deficiency of this method is also pointed out.