论文标题
Biermann电池的磁性水力学方法不足
The inadequacy of a magnetohydrodynamic approach to the Biermann Battery
论文作者
论文摘要
当电子压力梯度产生的电场具有卷曲时，可以通过Biermann电池在等离子体中生成磁场。当电子分布函数从Maxwellian扭曲时，Biermann电池的常用磁流失动力学（MHD）模型会破裂。使用与惯性限制融合相关的激光 - 血浆相互作用的MHD和动力学模拟，我们已经表明，这种失真可以将产生Biermann的电场降低约50 \％。更重要的是，在MHD处理中使用通量限制器来处理非Maxwellian电子分布对电子热传输的影响，从而对产生Biermann产生的电场进行了完全非物理的预测，因此会对生成的磁场产生错误的预测。
Magnetic fields can be generated in plasmas by the Biermann battery when the electric field produced by the electron pressure gradient has a curl. The commonly employed magnetohydrodynamic (MHD) model of the Biermann battery breaks down when the electron distribution function is distorted away from Maxwellian. Using both MHD and kinetic simulations of a laser-plasma interaction relevant to inertial confinement fusion we have shown that this distortion can reduce the Biermann-producing electric field by around 50\%. More importantly, the use of a flux limiter in an MHD treatment to deal with the effect of the non-Maxwellian electron distribution on electron thermal transport leads to a completely unphysical prediction of the Biermann-producing electric field and so results in erroneous predictions for the generated magnetic field.
