Nonquasilinear evolution of particle velocity in incoherent waves with random amplitudes

Yves Elskens (1)

1 PIIM - Physique des interactions ioniques et moléculaires

The one-dimensional motion of $N$ particles in the field of many incoherent waves is revisited numerically. When the wave complex amplitudes are independent, with a gaussian distribution, the quasilinear approximation is found to always overestimate transport and to become accurate in the limit of infinite resonance overlap.

Mots clés: weak plasma turbulence; stochastic acceleration; hamiltonian chaos; transport

Domaines: Dynamique Chaotique [nlin.CD]; Physique des plasmas [physics.plasm-ph]; Systèmes dynamiques [math.DS]

Yves Elskens. Nonquasilinear evolution of particle velocity in incoherent waves with random amplitudes. Communications in Nonlinear Science and Numerical Simulation, 2010, 15, pp.10-15. ⟨hal-00267554v2⟩