论文标题
电流板中电子孔的动力学
The dynamics of electron holes in current sheets
论文作者
论文摘要
我们介绍了1.5D vlasov代码模拟，以典型的电流板的不均匀磁和电场中的电子孔的动力学，尤其是地球磁尾电流板的动态。模拟表明，电子孔的空间宽度和振幅在传播过程中没有显着变化，但是在电子孔周围局部的双层出现并表现为沿电子孔的静电电势的滴。我们证明，在传播到当前纸边界的过程中，电流板的中性平面周围产生的电子孔会减慢。尽管电流板的典型静电场确实提供了明显的贡献，但对电子孔制动的主要贡献是由不均匀的磁场提供的。模拟还表明，具有较大振幅的电子孔的速度更快。模拟结果表明，由于在当前纸的传播过程中，在地球的等离子体板边界层中报道的一些缓慢的电子孔可能出现在地球片片边界层中。
We present 1.5D Vlasov code simulations of the dynamics of electron holes in non-uniform magnetic and electric fields typical of current sheets and, particularly, of the Earth's magnetotail current sheet. The simulations show that spatial width and amplitude of electron holes do not substantially vary in the course of propagation, but there arises a double layer localized around the electron hole and manifested as a drop of the electrostatic potential along the electron hole. We demonstrate that electron holes produced around the neutral plane of a current sheet slow down in the course of propagation toward the current sheet boundaries. The leading contribution to electron hole braking is provided by the non-uniform magnetic field, though electrostatic fields typical of the current sheets do provide a noticeable contribution. The simulations also show that electron holes with larger amplitudes are slowed faster. The simulation results suggest that some of slow electron holes recently reported in the Earth's plasma sheet boundary layer may appear due to braking of initially fast electron holes in the course of propagation in the current sheet.
