电磁波在径向非均匀球对称等离子体中的衰减  

The attenuation of electromagnetic waves by inhomogeneous spherically symmetric plasma

作　　者：宋法伦[1] 曹金祥[1] 王舸[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥230027

出　　处：《物理学报》2004年第4期1110-1115,共6页Acta Physica Sinica

摘　　要：提出了一种计算任意入射角的电磁波在径向非均匀球对称等离子体中的传播和吸收的模型 .在此模型中 ,把非均匀等离子体球分成若干个同心等离子体球壳 ,并且假定每一个同心壳层内等离子体密度均匀分布 .采用几何光学近似方法 ,考虑相位系数和衰减系数的矢量性 ,分别研究了几种典型的非均匀密度分布形式的等离子体在不同碰撞频率、中心等离子体密度和电磁波入射角条件下对入射电磁波的传播和衰减特性 ,获得了一些有意义的结果 .A simulation model has been developed to calculate the transmission and absorpti on of electromagnetic waves by inhomogeneous spherically symmetric plasma.In thi s model,the nonuniform sphere is modeled by numbers of concentric spherical shel ls,and each has a fixed electron density.Using the geometrical optics approximat ion and considering that the phase coefficient and attenuation coefficient are v ectors,we have studied the property of absorption and transmission of electromag netic waves by inhomogeneous spherically symmetric plasma for different collisio n frequency,central plasma density and frequency of electromagnetic waves for th ree typical density distribution profiles.Some useful results are obtained.

关 键 词：电磁波 碰撞频率 等离子体 能量衰减 相位系数 衰减系数 数值计算 

分 类 号：O451[理学—无线电物理]