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arXiv 1504.01412physics.plasm-ph
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碰撞等离子体中横向电磁场产生纵向电流

Generation of longitudinal electric current by the transversal electromagnetic field in collisional plasma

A. V. Latyshev, A. A. Yushkanov

摘要:

本文采用动力学Vlasov方程和BGK(Bhatnagar-Gross-Krook)碰撞积分。考虑了任意温度(即电子气体的任意简并度)的情况。从动力学Vlasov方程出发,得到了横向电磁场大小的平方律近似分布函数。推导了计算电流的公式。该公式包含一维求积。结果表明,非线性因素导致沿波矢方向的纵向电流的产生。该纵向电流垂直于在线性分析处接收的已知横向经典电流。当碰撞频率趋于零时,碰撞等离子体的所有结果都通过了已知的无碰撞等离子体的相应公式。波数的小值的情况下被认为是。结果表明,在碰撞频率趋于零时,纵向电流的接收量也符合无碰撞等离子体电流的已知相应表达式。对无量纲电流密度随波数、电磁场振荡频率和电子与等离子体粒子碰撞频率的变化规律进行了图解研究。

英文摘要:

Kinetic Vlasov equation for collisional plasmas with BGK (Bhatnagar-Gross-Krook) collision integral is used. The case of arbitrary temperature (i.e. arbitrary degree of degeneration of electronic gas) is considered. From kinetic Vlasov equation the distribution function in square-law approximation on size of transversal electromagnetic field is received. The formula for calculation electric current is deduced. This formula contains one-dimension quadrature. It is shown, that the nonlinearity account leads to occurrence the longitudinal electric current directed along the wave vector. This longitudinal current is perpendicular to the known transversal classical current, received at the linear analysis. When frequency of collisions tends to zero, all received results for collisional plasma pass in known corresponding formulas for collisionless plasma. The case of small values of wave number is considered. It is shown, that the received quantity of longitudinal current at tendency of frequency of collisions to zero also passes in known corresponding expression of current for collisionless plasmas. Graphic research of dimensionless density of the current depending on wave number, frequency of oscillations of electromagnetic field and frequency of electron collisions with plasma particles is carried out.

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