A derivation of the energy densities and power flows of plasma waves in a planar two‐dimensional electron‐ion plasma is presented through a simple approach. In this method, the response of an external current density introduced into the system is determined by a so‐called dispersion function. The advantage of the dispersion function is that it yields not only the dispersion relations of both plasmon (high‐frequency) and ion‐acoustic (low‐frequency) waves of the system, but expressions for the energy relations as well.

中文翻译：

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平面二维电子离子等离子体中等离子体波的能量关系

通过一种简单的方法，可以得出平面二维电子离子等离子体中的等离子体波的能量密度和功率流。在这种方法中，引入系统的外部电流密度的响应由所谓的色散函数确定。色散函数的优点是它不仅可以产生系统的等离激元（高频）和离子声（低频）波的色散关系，而且还可以表示能量关系。