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Nonlinear drift phase-space structures

Published online by Cambridge University Press:  13 March 2009

Sharadini Rath
Affiliation:
Institute For Plasma Research, Bhat, Gandhinagar 382 424, Gujarat, India
P. K. Kaw
Affiliation:
Institute For Plasma Research, Bhat, Gandhinagar 382 424, Gujarat, India

Abstract

The collisionless Vlasov–Poisson system in the drift approximation is examined for the existence of maximum-entropy nonlinear coherent solutions in the steady state. Two major nonlinear effects are taken into account. The first is the velocity-space trapping of particles, leading to closed trajectories in phase space. The second is the physical-space trapping of particles, leading to closed trajectories in the plane perpendicular to the magnetic field. The regions of validity of these nonlinearities are discussed and their relative importance demonstrated. Numerical solutions of the equations describing the nonlinear stationary states in one and two dimensions are presented.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1992

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