Non-equilibrium two-fluid plasmas can generate magnetic fields and flows\n simultaneously

2011/02/15 by H. Saleem, Saleem, Hamid
Engineering · Physics and Astronomy · #Laser-induced spectroscopy and plasma #Ionosphere and magnetosphere dynamics #Solar and Space Plasma Dynamics

paper · pdf · doi:10.48550/arxiv.1102.2968

Abstract

A new analytical solution of the set of highly nonlinear two-fluid equations\nis presented to explain the mechanism for the generation of "seed" magnetic\nfield and plasma flow by assuming the density n to have a profile like an\nexponential in xy-plane and temperature profiles of electrons (ions) to be\nlinear in yz-plane. It is shown that the baroclinic vectors -\n\∇\Ψ\×\∇ T_j (where \Ψ = ln\n, \n is normalized\ndensity, and T_j denote the temperatures of electrons and ions for j = e,\ni) can generate not only the magnetic field but the plasma flow as well. It is\nalso pointed out that the electron magnetohydrodynamics (EMHD) model has\ninconsistencies because it does not take into account the ion dynamics while\nthe magnetic field is produced on slow time scale. The estimate of the\nmagnitude of the magnetic field in a classical laser plasma using this model is\nin agreement with the experimental observations.\n

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