摘要
利用等离子体流体模型和线性场理论,分别导出了等离子体均匀填充和无限薄环形填充两种条件下,圆柱波导中电磁波传播的色散方程,并分别数值计算了其等离子体低频模式所满足的色散关系.研究发现,在无限薄环形等离子体填充条件下,低频等离子体模式与均匀填充情况有很大差别,不再有无穷多条低频模式的色散曲线,而且其截止频率也不再受到等离子体频率的限制.
A cylindrical waveguide filled with an infinitely thin annular plasma or uniform plasma is immersed in a strong longitudinal magnetic field. By means of fluid model and linear field theory, the dispersion equations of the electromagnetic wave propagation along the system in two different plasma - filling cases are derived, respectively. The dispersion characteristics of low- frequency modes in two cases are analyzed accordingly. It is found that the frequency of the low - frequency mode couldn＇ t be confined by plasma oscillation frequency and only a dispersion curve of low - frequency mode lies in the case of the infinitely thin annular plasma - filling
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第9期1590-1593,共4页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(10347009)
四川省教育厅自然科学基金资助项目(2003B019)
关键词
等离子体
圆柱波导
低频模式
色散关系
plasma
cylindrical waveguide
low - frequency mode
dispersion relation
