Numerical simulation of surface waves in a stratified magnetoplasma using a Plasma Fluid Finite Difference Time Domain Simulation (PF-FDTD)

Physics – Plasma Physics

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[7833] Space Plasma Physics / Mathematical And Numerical Techniques

Scientific paper

We investigate the propagation of surface waves along the interface between two magnetoplasmas of different static magnetic fields and fluid densities. These type of surface waves have been expected to propagate along magnetic field lines in solar wind structures. The surface waves found in magnetized plasmas are somewhat different from the typical surface waves since they can have a complex form for the attenuation constant. Some work has been performed that analytically treats the boundary value problem to find the attenuation constants in the two mediums, but full-wave simulations are rare. To achieve some degree of realism, the plasma density is prescribed as a linear function of the coordinates perpendicular to the interface. The code is set up to simulate both the electrons and the ions, but we concentrate on ion motions by computationally shutting off the electron motions. For the results presented in this work, the flow velocities are turned OFF in both the mediums. In particular we perform the numerical simulations in order to obtain the spatial structure of a given surface wave mode.

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