How Electron Two-Stream Instability Drives Cyclic Langmuir Collapse and Continuous Coherent Emission
Space Physics
2017-02-07 v1 Solar and Stellar Astrophysics
Plasma Physics
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.
Cite
@article{arxiv.1702.00784,
title = {How Electron Two-Stream Instability Drives Cyclic Langmuir Collapse and Continuous Coherent Emission},
author = {H. Che and M. L. Goldstein and P. H. Diamond and R. Z. Sagdeev},
journal= {arXiv preprint arXiv:1702.00784},
year = {2017}
}
Comments
1/30/2017, published in Proceedings of the National Academy of Sciences of the United States of America