波在磁化周期等离子体中的传播特性

电磁波与等离子体之间存在极为丰富的相互作用现象,对电磁波的传播构成重大影响。该文研究了在磁场指导下,对电磁波在密度周期变化的磁化等离子体中的传播特性,进行了理论分析并导出色散方程,通过数值计算分析了等离子体密度变化分别对电磁波传播特性的影响。计算结果表明密度n1变化对左、右旋波的截止频率影响不大,而n0的变化对左旋波的截止频率影响大,对右旋波的通带宽度影响大。并发现密度周期变化磁化等离子体构成一周期慢波系统,在该系统中明显出现慢波,这可能对注波互作用产生重大影响。

Propagation Characteristics of Electromagnetic Wave in an Unbound Periodic Magnetized Plasma

There are a lot of interaction phenomenon between electromagnetic wave and plasmas. In this paper, propagation characteristics of electromagnetic wave in unbound periodic and magnetized plasma are strictly analyzed in theory, and the dispersion equation is obtained. By numerical calculation, the affection of change of plasma background density and the sinusoidal variation amplitude value of plasma density on propagation characteristics of electromagnetic wave is analyzed. The results of calculation presents that the effect of change of plasmas density on two characteristic wave (right hand wave and left hand wave) is different. The change of sinusoidal amplitude value of plasma density has a poor effect on the cut off frequency of right hand wave and left hand wave, however, plasma background density has a big effect on the cut off frequency of right hand wave and left hand wave. Meanwhile, this system is a periodic slow wave system in which slow wave is found and may make some important effects on bean-wave interaction.