Abstract

For the two-fluid hydrodynamic cold plasma model, differential relations characterizing the energy conservation law are derived. The case when the motion of the heavier ions can be neglected as compared with the electrons and the situations with and without allowance for the relativistic factor in the electron dynamics are considered separately. For the problem of free plasma oscillations initiated by a short intense laser pulse, numerical results concerning the fulfillment of the energy conservation law in all above-mentioned situations are presented. The main result is that the reliability of the computations can be improved substantially via the standard theoretical study of the approximation and stability, together with experimental observation of energy conservation.

中文翻译：

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节能法在冷等离子体模型中的应用

摘要

对于两流体水动力冷等离子体模型，推导了表征能量守恒定律的微分关系。与电子相比，可以忽略较重离子的运动的情况，以及在电子动力学中考虑和不考虑相对论因素的情况。对于由短的强激光脉冲引发的自由等离子体振荡的问题，提出了关于在上述所有情况下均满足能量守恒定律的数值结果。主要结果是，通过近似和稳定性的标准理论研究以及节能的实验观察，可以大大提高计算的可靠性。