电子磁流体模型及Biermann电池效应和位移电流效应

Electron magnetohydrodynamics(EMHD) and Biermann battery and displacement current effects

电子磁流体(Electron Magnetohydrodynamics,EMHD)理论在空间、天体等离子体物理以及纯电子等离子体物理领域,特别是磁场的产生、磁力线的重联等重要物理现象的研究中有广泛应用.近年来对一些空间、天体物理过程的实验室模拟以及相关的激光等离子体物理与高能量密度物理的研究中,等离子体物理过程的快尺度时空演化导致位移电流效应、Biermann电池效应等对电子磁流体模型的一些基本假设产生重要的修正.本文在讨论分析电子磁流体理论模型主要近似的基础上,研究了Biermann电池效应与位移电流引起的效应,并进一步讨论了这一些效应对一些重要等离子体物理过程的影响.

Electron magnetohydrodynamics （EMHD） theory is extensively applied in astrophysical and space plasma studies, particularly in important physical processes such as magnetic field generation and/or reconnection. In recent laboratory simulation of certain space and astrophysical phenomena, and related laser plasma and high energy density physics researches, effects of displacement current and/or Biermann battery on conventional EMHD model are found significant. Based on analysis of EMHD approximations, in this paper, we study those effects on EMHD model and related important plasma physical processes.