Long-time discrete particle effects versus kinetic theory in the self-consistent single-wave model

M-C. Firpo; F. Doveil; Y. Elskens; P. Bertrand; M. Poleni; D. Guyomarc’h

doi:10.1103/PhysRevE.64.026407

Long-time discrete particle effects versus kinetic theory in the self-consistent single-wave model

M-C. Firpo, F. Doveil, Y. Elskens, P. Bertrand, M. Poleni, and D. Guyomarc’h

Phys. Rev. E 64, 026407 – Published 20 July 2001

Abstract

The influence of the finite number N of particles coupled to a monochromatic wave in a collisionless plasma is investigated. For growth as well as damping of the wave, discrete particle numerical simulations show an N-dependent long time behavior resulting from the dynamics of individual particles. This behavior differs from the one due to the numerical errors incurred by Vlasov approaches. Trapping oscillations are crucial to long time dynamics, as the wave oscillations are controlled by the particle distribution inhomogeneities and the pulsating separatrix crossings drive the relaxation towards thermal equilibrium.

Received 28 February 2001

DOI:https://doi.org/10.1103/PhysRevE.64.026407

Authors & Affiliations

M-C. Firpo^1,2,*, F. Doveil^1,†, Y. Elskens^1,‡, P. Bertrand^3,§, M. Poleni³, and D. Guyomarc’h¹

¹Physique des Interactions Ioniques et Moléculaires, Unité 6633 CNRS–Université de Provence, Equipe Turbulence Plasma, Case 321, Centre de Saint-Jérôme, F-13397 Marseille Cedex 20, France
²Dipartimento di Energetica “Sergio Stecco,” Università degli Studi di Firenze, Via Santa Marta, 3, I-50139 Firenze, Italy
³Laboratoire de Physique des Milieux Ionisés et Applications, Unité 7040 CNRS–Université H. Poincaré, Nancy I, Boîte Postale 239, F-54506 Vandœuvre Cedex, France

^*Email address: firpo@newsup.univ-mrs.fr
^†Email address: doveil@newsup.univ-mrs.fr
^‡Email address: elskens@newsup.univ-mrs.fr
^§Email address: Pierre.Bertrand@lpmi.uhp-nancy.fr

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Vol. 64, Iss. 2 — August 2001

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