Numerical computer simulation of cross-field propagation of a plasma stream in a magnetic field

Astronomy and Astrophysics – Astrophysics

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Collisionless Plasmas, Computerized Simulation, Magnetic Fields, Magnetohydrodynamic Flow, Electric Fields, Electrostatic Waves, Plasma Density, Positive Ions, Wave Propagation

Scientific paper

Plasma propagation across a magnetic field in a vacuum is simulated with a 1D nonperiodic electrostatic simulation, and the results are compared to those from the model by Galvez (1987). The model incorporates a Maxwellian collisionless neutral-plasma stream composed of positive ions and electrons and a particle simulation code with one spatial and three velocity components and a nonperiodic boundary condition. The stream of plasma polarizes when it is injected across an ambient magnetic field, and the polarization electric field causes the penetration of plasma across the magnetic field, thereby maintaining the integrity of the plasma. Cross-field propagation is assessed for a variety of plasma parameters by computer simulation. The average drift velocity of the plasma approaches the initial plasma velocity as the plasma density becomes sufficiently large.

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