THE NON-GEOMETRICAL OPTIC SOLUTION FOR THE ALFVEN WAVE IN DOUBLE PLASMA BEAM MODEL
双等离子体流模型中阿尔芬波的非几何光学近似解

We used the smooth pertubation method to treat the problem of Alfven wave propagation in double, plasma system. The wave propagation is analysed for two cases. One is that when the dense homogeneous beam moves in an inhomogeneous background plasma and the another one is the opposite situation.The results are briefly discussed.