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

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

2001-05-15

arxiv.org/abs/physics/0105045v1

Phys. Rev. E 64 (2001) 026407 (10 pages)

Physics

Plasma Physics

11 pages incl. 13 figs. Phys. Rev. E, in press

Scientific paper

10.1103/PhysRevE.64.026407

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.

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