二维垂直无碰撞激波的全粒子模拟
Two-dimensional full particle simulation of a perpendicular collisionless shock with a shock-rest-frame model
摘要：
本文发展了一个用于粒子模拟的二维激波静止框架模型。然后用二维全粒子模拟研究了垂直无碰撞激波的全动力学。我们发现，在2D模拟中有较少的非热电子由于冲浪加速，这是在以前的1D模拟中看到的高马赫数垂直冲击在低β和弱磁化等离子体。这是因为粒子沿周围磁场的运动干扰了电子冲浪加速所必需的相干静电孤立结构的形成。
英文摘要：
A two-dimensional (2D) shock-rest-frame model for particle simulations is developed. Then full kinetic dynamics of a perpendicular collisionless shock is examined by means of a 2D full particle simulation. We found that in the 2D simulation there are fewer nonthermal electrons due to surfing acceleration which was seen in the previous 1D simulations of a high Mach number perpendicular shock in a low-beta and weakly magnetized plasma. This is because the particle motion along the ambient magnetic field disturbs the formation of coherent electrostatic solitary structures which is necessary for electron surfing acceleration.
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