Filamentation instability of long Alfvén waves in warm collisionless plasmas

T. Passot, P. L. Sulem

doi:10.1063/1.1611487

Filamentation instability of long Alfvén waves in warm collisionless plasmas

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T. Passot

CNRS, Observatoire de la Côte d’Azur, B.P. 4229, 06304 Nice Cedex 4, France
P. L. Sulem

CNRS, Observatoire de la Côte d’Azur, B.P. 4229, 06304 Nice Cedex 4, France

書誌事項

公開日: 2003-10-01

DOI

10.1063/1.1611487

公開者: AIP Publishing

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説明

<jats:p>A criterion for filamentation instability of a circularly polarized Alfvén wave train propagating along a strong ambient field in a collisionless plasma is obtained from a transverse modulational analysis of a generalized kinetic derivative nonlinear Schrödinger equation. This equation, which retains Landau damping, results from the Vlasov–Maxwell equations via a long-wave reductive perturbative expansion. For bi-Maxwellian equilibrium distribution functions, it is shown that a moderate anisotropy of the electron temperature and/or a moderate ratio of the electron to ion temperatures can significantly broaden the existence range of this instability, making its occurrence possible in small-β plasmas.</jats:p>