Harmonic Langmuir waves. III. Vlasov simulation
摘要：
Generation of harmonic Langmuir modes during beam-plasma interaction is studied by means of nonlinear theoretical calculations and computer simulations. The present Vlasov simulation of multiple harmonic Langmuir modes (up to 12th harmonics), generalizes the previously available simulations which were restricted to the second harmonic only. The frequency-wave-number spectrum obtained by taking the Fourier transformation of simulated electric field both in time and space shows an excellent agreement with the theoretical nonlinear dispersion relations for harmonic Langmuir waves. The saturated wave amplitude features a quasi-power-law spectrum which reveals that the harmonic generation process may be an integral part of the Langmuir turbulence.
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关键词：
Electrostatic waves and oscillations Fokker-Planck and Vlasov equation Particle beam interactions in plasmas
DOI：
10.1063/1.1537240
被引量：
年份：
2003
AIP Publishing
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