电磁波在磁化等离子体表面的功率反射系数计算研究

采用等效输入阻抗方法计算金属平板前非均匀磁化等离子体层对垂直入射电磁波的功率反射系数，结果表明，电子数密度大小、等离子体层厚度、入射波频率和外磁场是功率反射系数的主要影响因素.电子数密度取值必须合适，外加磁场才能明显降低等离子体对入射电磁波的功率反射系数.入射电磁波频率增加时，必须加大外磁场强度，才能明显降低功率反射系数. 关键词： 等离子体中电磁波的传输 等离子体特性 电磁波

Calculation of the wave reflecting characteristics of magnetized plasma surface

The total wave energy reflectance of the interface between the magnetized plasma before a conductor plate and the atmosphere or vacuum can be calculated by usin g the equivalent input impedance method. The result is that the reflection chara cteristics can be affected by electron numerical density, magnetized plasma thic kness, incidence wave frequency and magnetic intensity. Magnetic field can reduc e wave energy reflectance obviously only when the electron numerical density is of an appropriate value. The increased frequency of the incident wave must accom pany the augmented magnetic intensity, which is the condition that magnetized pl asma will absorb more energy of the electromagnetic wave.