非均匀等离子体中波传播耦合方程

我们从麦克斯韦方程和线性化矩方程出发,获得了具有电子密度梯度的弱非均匀可压缩等离子体在外场作用下的电磁波和电声波激发的耦合方程,并求得了微扰解。最后讨论了非均匀可压缩等离子体中电磁波和电声波耦合激发机制,指出不同模间耦合是产生不同模间相互转换的原因,而Cohen等人的均匀可压缩等离子体中电磁波和电声波激发过程均可视为本文的特殊情况。

ON COUPLING EQUATION OF WAVE PROPAGATION IN THE INHOMOGENEOUS PLASMA

Starting from the Maxwell's equations and the moment's equations, We have derived the Coupling equations of electromagnetic and electroacoustic waves -in inhomogeneous compressible plasmas with electron density gradient under the action of external fields. And then, the perturbation solution of electromagnetic and electro-acoustic waves coupling equations is presented.Finally, a discussion is given on the coupling excitation mechanisms of electromag-netic and electroacoustic waves in such plasmas, showing that the coupling between different modes is the cause of their mutual transformation and the excitation process of these waves in homogeneous and compressible plasmas given by eohen is only a special case of the present result.