中文摘要：

基于Monte-Carlo模型计算出的电子束空气等离子体电子数密度分布,建立了不同工况下该等离子体的形态参数和电磁参数模型。利用该模型对有、无电子束空气等离子体时目标电磁散射的变化进行了仿真计算,获得了不同工况下遮挡等离子体后相对于遮挡前电磁散射强度平均相对衰减。将仿真结果与相应工况下的实验结果进行了比较,对比结果表明：基于Monte-Carlo模型计算出的电子束空气等离子体电子数密度分布具有较高的可靠性。因此,建立的形态参数与电磁参数模型为深入研究电子束空气等离子体特性奠定了基础。

英文摘要：

According to the electron density distribution simulation of electron-beam-generated air plasma based on Monte-Carlo model,we established a model of shape parameters and electromagnetic parameters of the plasma in different situations.Using the model,we calculated the electromagnetic scattering of radar targets in the presence or absence of electron-beam-generated air plasma covering.Besides,the average relative attenuations of the electromagnetic scattering in different cases were acquired.Then the simulation results were compared with experimental results in corresponding situations.The comparison indicates that the simulation results of the electron distribution based on Monte-Carlo model are reliable.Moreover,the presented model of shape parameters and electromagnetic parameters provide a new approach to investigate the characteristics of electron-beam-generated air plasma in detail.