Publication
Physics of Fluids
Paper

Electrostatic oscillations in plasmas with cutoff distributions

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Abstract

When numerically solving the linear Vlasov equation with cutoff electron distributions, the well-known Landau-damped oscillation of the electric field was observed first but, after a short transition time, a constant-amplitude harmonic oscillation with a frequency distinctly higher than Landau's frequency was found. This coexistence of two distinct modes of oscillation - one damped and one undamped - has not been observed before. The behavior is explained quantitatively by comparison of the dispersion equation solution with the results obtained from the numerical solution of Vlasov's equation.

Date

31 Jul 2003

Publication

Physics of Fluids