4:00 PM - 4:15 PM
[PEM19-09] Particle Acceleration and Shock Structures in a Shock-Shock Interaction: 1D full-PIC simulation
Keywords:collisionless shock, shock-shock interaction, particle acceleration
Recently, we have performed one-dimensional full PIC simulations to investigate a shock-shock interaction in which two quasi-perpendicular and super-critical shocks collide head-on. In this case, only electrons are accelerated between the two shocks (Fermi acceleration) before the two shocks collide [Nakanotani et al., 2017].
We discuss the case of two quasi-parallel shocks. In the present case, ions can go back upstream and are accelerated between the two shocks as electrons in the case of quasi-perpendicular shocks. The pressure of those energetic ions between the two shocks are comparable with the pressure in the downstream of the shocks. It has a potential to alter the shock structure.