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Journal or Publication Title:
Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
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Title:
3D HYBRID-PIC SIMULATION OF PLASMA EXPANSION IN THE PRESENCE OF A DIPOLE MAGNETIC FIELD
Creator:
H. B. Nersisyan ; D. A. Osipyan ; K. A. Sargsyan ; M. V. Sargsyan ; H. H. Matevosyan
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Abstract:
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 3D hybrid (kinetic ions and massless fluid electrons) model. The retardation of the plasma cloud and the dynamics of the perturbed electro¬magnetic fields and the background plasma are studied for high Alfvén-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.