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Title: Nontrapping Arrest of Langmuir Wave Damping near the Threshold Amplitude

Abstract

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.

Authors:
;  [1]
  1. School of Physics, The University of Sydney, New South Wales 2006, Sydney (Australia)
Publication Date:
OSTI Identifier:
20775228
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 17; Other Information: DOI: 10.1103/PhysRevLett.96.175001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; DAMPING; DISTRIBUTION FUNCTIONS; EVOLUTION; LANGMUIR FREQUENCY; PERTURBATION THEORY; PHASE SPACE; PLASMA; PLASMA WAVES; POTENTIALS; TRAPPING

Citation Formats

Ivanov, A.V., and Cairns, Iver H. Nontrapping Arrest of Langmuir Wave Damping near the Threshold Amplitude. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.175001.
Ivanov, A.V., & Cairns, Iver H. Nontrapping Arrest of Langmuir Wave Damping near the Threshold Amplitude. United States. doi:10.1103/PhysRevLett.96.175001.
Ivanov, A.V., and Cairns, Iver H. Fri . "Nontrapping Arrest of Langmuir Wave Damping near the Threshold Amplitude". United States. doi:10.1103/PhysRevLett.96.175001.
@article{osti_20775228,
title = {Nontrapping Arrest of Langmuir Wave Damping near the Threshold Amplitude},
author = {Ivanov, A.V. and Cairns, Iver H.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.96.175001},
journal = {Physical Review Letters},
number = 17,
volume = 96,
place = {United States},
year = {Fri May 05 00:00:00 EDT 2006},
month = {Fri May 05 00:00:00 EDT 2006}
}