期刊
PHYSICA D-NONLINEAR PHENOMENA
卷 393, 期 -, 页码 1-8出版社
ELSEVIER
DOI: 10.1016/j.physd.2018.12.007
关键词
Wave-particle nonlinear interaction; Kinetic equation; Resonances; Distribution function
We consider a kinetic equation describing evolution of the particle distribution function in a system with nonlinear wave-particle interactions (trappings into resonance and nonlinear scatterings). We study properties of its solutions and show that the only stationary solution is a constant, and that all solutions with smooth initial conditions tend to a constant as time grows. The resulting flattening of the distribution function in the domain of nonlinear interactions is similar to one described by the quasi-linear plasma theory, but the distribution evolves much faster. The results are confirmed numerically for a model problem. (C) 2019 Elsevier B.V. All rights reserved.
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