Self-consistent Lagrangian study of nonlinear Landau damping.
Phys Rev E Stat Nonlin Soft Matter Phys
; 71(1 Pt 2): 017402, 2005 Jan.
Article
em En
| MEDLINE
| ID: mdl-15697777
ABSTRACT
The electric field computed by numerically solving the one-dimensional Vlasov-Poisson system is used to calculate Lagrangian trajectories of particles in the wave-particle resonance region. The analysis of these trajectories shows that, when the initial amplitude of the electric field is above some threshold, two populations of particles are present a first one located near the separatrix, which performs flights in the phase space and whose trajectories become ergodic and chaotic, and a second population of trapped particles, which displays a nonergodic dynamics. The complex, nonlinear interaction between these populations determines the oscillating long-time behavior of solutions.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article