基于等效电路模型的介质材料二次电子发射系数研究

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资料介绍

材料表面的二次电子发射过程是空间大功率微波射频器件微放电效应的触发与维持机制。微放电效应是限制空间大功率微波部件应用的关键问题之一。因此,对材料二次电子发射特性的研究与表征非常重要。为正确理解电子辐照下介质样品的充放电过程,文章提出一种基于等效电路模型的理论模型对二次电子发射特性进行表征。针对不同电导率样品进行仿真验证以证实该电路模型的有效性。仿真结果与理论分析结果相符。

The secondary electron emission(SEE)from materials used in high power RF devices in space is the main trigger and sustaining mechanism of the resonant avalanche electron discharge known as the multipactor effect.Multipactor effect is one of the key issues to limit the application of high power microwave components in space.Therefore,its study and characterization are essential in radio-frequency applications.In this paper,we propose a theoretical model,based on equivalent circuit models,to properly understand charging and discharging processes that occur in dielectric samples under electron irradiation for secondary electron emission characterization.Simulation results are presented to verify the accuracy of the proposed model.Good agreement between theory and simulation results has been found.