Collisionless plasma expansion in the presence of a dipole magnetic field
| Autor: | D. A. Osipyan, H. B. Nersisyan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Physics
Waves in plasmas FOS: Physical sciences Plasma Computational Physics (physics.comp-ph) Condensed Matter Physics Ion acoustic wave Lower hybrid oscillation complex mixtures Physics - Plasma Physics Plasma Physics (physics.plasm-ph) Two-stream instability Physics::Plasma Physics Upper hybrid oscillation Physics::Space Physics Electromagnetic electron wave sense organs Atomic physics Physics - Computational Physics Magnetosphere particle motion |
| Popis: | The collisionless interaction of an expanding high-energy plasma cloud with a magnetized background plasma in the presence of a dipole magnetic field is examined in the framework of a 2D3V hybrid (kinetic ions and massless fluid electrons) model. The retardation of the plasma cloud and the dynamics of the perturbed electromagnetic fields and the background plasma are studied for high Alfven-Mach numbers using the particle-in-cell method. It is shown that the plasma cloud expands excluding the ambient magnetic field and the background plasma to form a diamagnetic cavity which is accompanied by the generation of a collisionless shock wave. The energy exchange between the plasma cloud and the background plasma is also studied and qualitative agreement with the analytical model suggested previously is obtained. 10 pages, 4 figures |
| Databáze: | OpenAIRE |
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