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Formation of quasi-power law weak Langmuir turbulence spectrum by harmonic generation (2004)
| Venue: | NONLINEAR PROCESSES IN GEOPHYSICS |
BibTeX
@MISC{Yoon04formationof,
author = {P. H. Yoon},
title = {Formation of quasi-power law weak Langmuir turbulence spectrum by harmonic generation},
year = {2004}
}
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Abstract
Langmuir wave turbulence generated by a beamplasma interaction has been studied since the early days of plasma physics research. Despite a long history of investigation on this subject, among the outstanding issues is the generation of harmonic Langmuir waves observed in both laboratory and computer-simulated experiments. However, the phenomenon has not been adequately explained in terms of theory, nor has it been fully characterized by means of numerical simulations. In this paper, a theory of harmonic Langmuir wave generation is put forth and tested against the Vlasov simulation results. It is found that the harmonic Langmuir mode spectra exhibit quasi power-law feature implying a multi-scale structure in both frequency and wave number space spanning several orders of magnitude.
Keyphrases
harmonic generation geophysics european geosciences union nonlinear process several order numerical simulation multi-scale structure number space harmonic langmuir wave generation early day vlasov simulation result long history outstanding issue beamplasma interaction computer-simulated experiment harmonic langmuir wave plasma physic research
