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High-frequency electromagnetic surface waves in a semi-bounded weakly ionized plasma

机译:半界弱电离等离子体中的高频电磁表面波

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摘要

High-frequency electromagnetic surface waves (SWs) in a weakly ionized plasma half-space with Maxwellian electrons are studied taking into account elastic electron-neutral collisions. The SWs spectrum and damping rate are obtained numerically for a wide range of wavelengths, and the asymptotes of damping rate are analytically calculated in some limits. It is shown that the high-frequency SWs become strongly damped at wavelengths λ < λ Min, where λ Min significantly depends on plasma parameters (e.g., electron temperature and electron and neutral atom density). The relative importance of collisional and Cherenkov (collisionless) damping of SWs is investigated and is graphically shown for a range of plasma parameters and SW wavelengths. The behavior of weakly ionized plasma with respect to the SW propagation has been recovered for the collisional parameter η.
机译:考虑到弹性电子中性碰撞,研究了具有麦克斯韦电子的弱电离等离子体半空间中的高频电磁表面波(SWs)。通过数字获得宽波长范围内的SWs光谱和阻尼率,并在一定范围内解析计算出阻尼率的渐近线。结果表明,高频开关在波长λ<λMin时被强烈衰减,其中λMin很大程度上取决于等离子体参数(例如,电子温度以及电子和中性原子密度)。研究了SW的碰撞阻尼和Cherenkov(无碰撞)阻尼的相对重要性,并以图形方式显示了一系列等离子参数和SW波长。对于碰撞参数η,已经恢复了弱离子化等离子体相对于SW传播的行为。

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