How Electron Two-Stream Instability Drives Cyclic Langmuir Collapse and Continuous Coherent Emission

Abstract

Continuous plasma coherent emission is maintained by repetitive Langmuir collapse driven by the nonlinear evolution of a strong electron two-stream instability. The Langmuir waves are modulated by solitary waves in the linear stage, and by electrostatic whistler waves in the nonlinear stage. Modulational instability leads to Langmuir collapse and electron heating that fills in cavitons. The high pressure is released via excitation of a short wavelength ion acoustic mode that is damped by electrons and that re-excites small-scale Langmuir waves---this process closes a feedback loop that maintains the continuous coherent emission.

1/30/2017, published in Proceedings of the National Academy of Sciences of the United States of America

References in corpus (8)

• A decade of solar Type III radio bursts observed by the Nancay Radioheliograph 1998-2008
• Large scale simulations of solar type III radio bursts: flux density, drift rate, duration and bandwidth
• Energy Budget and Imaging Spectroscopy of a Compact Flare
• The Origin of Non-Maxwellian Solar Wind Electron Velocity Distribution Function: Connection to Nanoflares in the Solar Corona
• Bi-Directional Energy Cascades and the Origin of Kinetic Alfvénic and Whistler Turbulence in the Solar Wind
• Electron Two-stream Instability and Its Application in Solar and Heliophysics
• High-Energy Aspects of Solar Flares: Overview of the Volume
• The Adiabatic Phase Mixing and Heating of Electrons in Buneman Turbulence

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