【摘要】 分析了以往电子光学模型进行电子枪模拟工作过程及存在的缺陷,指出粒子模拟方法能够全面考虑空间电荷限制和温度限制、阴极热初速、电子注非层流性等因素,研究电子注的瞬态和噪声特性,是一种更准确的电子枪模拟方法。以某电子枪为例,运用MafiaPIC模块进行了模拟计算,与实验结果对比表明Mafia粒子模拟具有相当精度,可用于指导微波管电子枪工程设计。更多还原

【Abstract】 After analyzing the design process with previous electron beam optics simulation and modeling tools and their shortcomings, this paper presents that MAFIA PIC simulation is a more accurate method as it can wholly support space-charge-limited (Child’s law) and temperature-limited emission, cathode thermal initial velocity and non-laminar flow. The 3-dimensional time-dependent PIC code is also desired for studying the beam transient and noise character. Using MAFIA PIC code to simulate an electron gun, some useful data are obtained, which show that the simulation results are close to the experimental data within acceptable error range. It can be used to instruct the engineering design of microwave tube electron optics.更多还原