Single-Mode Wave Decay

Abstract

The usual approach on electrostatic wave decay process for a weak beam-plasma system considers two different wave modes interplaying, the Langmuir and ion-sound mode. In the present paper, a single-mode approach is shown to be feasible for conditions where the respective dispersion relations undergo topological changes. Numerical solutions for the dispersion relation of a beam-plasma system are presented, supporting the modeling of an analytic dispersion relation of a single wave mode. This wave mode is accounted for in the kinetic equations for particles and waves, which rule the evolution of the system. The results are compared against the two-wave mode approach using Langmuir and ion-sound waves, within the context of weak turbulence theory. It is found that the single-mode approach can account for the basic features of particles and waves, since the single mode exhibits both low and high frequency regions, which ultimately play the roles of ion-sound and Langmuir modes, respectively.

Published in Physics of Plasmas

References in corpus (14)

• A Review of Solar Type III Radio Bursts
• Coherent Emission Mechanisms in Astrophysical Plasmas
• Global Properties of Solar Flares
• The Relationship Between Solar Radio and Hard X-ray Emission
• Statistical Description of Acoustic Turbulence
• Tracing Electron Beams in the Sun's Corona with Radio Dynamic Imaging Spectroscopy
• Self-consistent particle-in-cell simulations of fundamental and harmonic plasma radio emission mechanisms
• Particle-in-cell and weak turbulence simulations of plasma emission
• Solar type III radio burst time characteristics at LOFAR frequencies and the implications for electron beam transport
• Langmuir Wave Electric Fields Induced by Electron Beams in the Heliosphere
• Physical Regimes of Electrostatic Wave-Wave nonlinear interactions generated by an Electron Beam Propagating in a Background Plasma
• Tracking a beam of electrons from the low solar corona into interplanetary space with the Low Frequency Array, Parker Solar Probe and 1 au spacecraft
• Wave excitation by energetic ring-distributed electron beams in the solar corona
• Plasma Emission Induced By Electron Beam in Weakly Magnetized Plasmas