Induced bremsstrahlung of Langmuir waves from interaction between ion-wave turbulence and electrons

Details Induced bremsstrahlung of Langmuir waves from interaction between ion-wave turbulence and electrons Induced bremsstrahlung of Langmuir waves from interaction between ion-wave turbulence and electrons

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981phrva..23.3272n&link_type=abstract

Physical Review A - General Physics, 3rd Series, vol. 23, June 1981, p. 3272-3278. Research supported by the Alexander von Humb

Physics

General Physics

29

Bremsstrahlung, Electrons, Electrostatic Waves, Ionic Waves, Plasma Radiation, Plasma-Particle Interactions, Coupled Modes, Electron Density (Concentration), Free Energy, Perturbation Theory, Plasma Oscillations, Vlasov Equations

Scientific paper

Consideration is given to Langmuir wave excitation in a plasma characterized by ion-wave turbulence and electrons resonating with the ion waves which give rise to induced bremsstrahlung. Expressions for the unperturbed steady ion wave turbulence state resulting from nonlinear interactions between the fields and the particles are obtained, and an external high-frequency small perturbation field is applied to the system, resulting in mode-coupling between the perturbation field and the quasi-steady finite-amplitude turbulent field. From these equations and the Poisson equation, the effective dielectric constant of the Langmuir wave in the presence of ion-wave turbulence is obtained. The growth of the Langmuir waves due to Langmuir wave emission and absorption by the resonant electrons is determined, and enhanced Langmuir waves are obtained for any electron distribution except the plateau distribution. The Langmuir wave growth rates due to induced bremsstrahlung are found to be of the same order of magnitude as those due to the three-wave decay and nonlinear scattering of conventional weak turbulence theory.

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