Nontrapping Arrest of Langmuir Wave Damping near the Threshold Amplitude

Journal Article · Fri May 05 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.175001· OSTI ID:20775228

Ivanov, A V; Cairns, Iver H ^[1]

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1. School of Physics, The University of Sydney, New South Wales 2006, Sydney (Australia)

Evolution of a Langmuir wave is studied numerically for finite amplitudes slightly above the threshold which separates damping from nondamping cases. Arrest of linear damping is found to be a second-order effect due to ballistic evolution of perturbations, resonant power transfer between field and particles, and organization of phase space into a positive slope for the average distribution function f{sub av} around the resonant wave phase speed v{sub {phi}}. Near the threshold trapping in the wave potential does not arrest damping or saturate the subsequent growth phase.

• OSTI ID: 20775228
• Journal Information: Physical Review Letters, Vol. 96, Issue 17; Other Information: DOI: 10.1103/PhysRevLett.96.175001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
DAMPING
DISTRIBUTION FUNCTIONS
EVOLUTION
LANGMUIR FREQUENCY
PERTURBATION THEORY
PHASE SPACE
PLASMA
PLASMA WAVES
POTENTIALS
TRAPPING