Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phfl...25..392h&link_type=abstract
Physics of Fluids, vol. 25, Feb. 1982, p. 392-401.
Physics
39
Electron Beams, Electrostatic Waves, Plasma-Particle Interactions, Type 3 Bursts, Wave Scattering, Ion Acoustic Waves, Nonlinear Equations, Plasma Turbulence, Wave Interaction
Scientific paper
Wave-wave interactions are examined, particularly for significance in relation to Langmuir turbulence associated with type III solar radio emissions. The Zakharov equations are considered as two coupled nonlinear partial differential equations for the low-frequency density and the Langmuir envelope, and the electron and ion temperatures are regarded as equal. The Zhakharov equations are solved in one dimension, and display no collapse of a driven broadband pump, indicating that scattering instabilities are important in the saturation of a beam-plasma instability. A two-dimensional numerical simulation is developed to interpret the role of parametric instabilities, and it is concluded that the distortion of a wave packet is due to scattering instability, and not a change in the physics of direct collapse due to an artificial numerical damping. Further discussions are presented for comparisons of models of Langmuir turbulence in type III bursts.
Goldman Martin V.
Hafizi B.
Nicholson Dwight R.
Weatherall James C.
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