非磁化均匀冷等离子体柱的电磁波散射特性分析  

The characteristic of electromagnetic scattering by uniform unmagnetized cold plasma cylinder

作　　者：黄方意[1,2] 时家明[1,2] 袁忠才[1,2] 汪家春[1,2] 陈宗胜[1,2] 林志丹[1,2] 许波[1,2] 王超[1,2] 

机构地区：[1]脉冲功率激光技术国家重点实验室,电子工程学院,合肥230037 [2]安徽省红外与低温等离子体重点实验室,电子工程学院,合肥230037

出　　处：《核聚变与等离子体物理》2013年第3期277-282,共6页Nuclear Fusion and Plasma Physics

基　　金：教育部新世纪优秀人才支持计划(2010A001005D)

摘　　要：研究了电磁波与柱状等离子体介质相互作用的特性。推导了平行和垂直极化波作用下等离子体柱内外的场分布特征,计算分析了两种极化波条件下等离子体柱的电磁散射。结果表明,等离子体电子密度越高,柱外散射强度就越大,等离子体碰撞频率越高,柱外散射强度就越小。另外,电磁波极化方式和入射波频率对电磁波的散射强度也有重大影响,垂直极化波更容易被散射,较低的入射波频率也更容易散射。这些结果对于等离子体天线的研究设计有一定的参考价值。The characteristic of electromagnetic scattering by plasma cylinder is researched in this paper. Scattered fields of the parallel-polarized wave and vertical-polarized wave by plasma cylinder are calculated and analyzed. The calculated results show that the higher the electron density, is the greater the scattering intensity in the outside of the cylinder and the higher the plasma frequency of collision, is the smaller the scattering intensity in the outside of the column. In addition, the electromagnetic wave polarization and frequency of the incident wave also have a significant impact on the scattering intensity of electromagnetic waves, the vertically polarized wave is more likely to be scattered, and the lower frequency of the incident wave is also easier to scattering. These have certain reference value for designing and studying of the plasma antenna.

关 键 词：等离子体柱 电磁散射 散射强度 

分 类 号：O532.24[理学—等离子体物理]