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 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 reexcites small-scale Langmuir waves; this process closes a feedback loop that maintains the continuous coherent emission.
- Authors:
-
- Department of Astronomy, University of Maryland, College Park, MD 20742,, Heliospheric Physics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771,
- Heliospheric Physics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771,
- Department of Physics, University of California, San Diego, La Jolla, CA 92093,
- Department of Physics, University of Maryland, College Park, MD 20742
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE; National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1341768
- Alternate Identifier(s):
- OSTI ID: 1465122
- Grant/Contract Number:
- FG02-04ER54738; NNG04EB99C
- Resource Type:
- Published Article
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 114 Journal Issue: 7; Journal ID: ISSN 0027-8424
- Publisher:
- Proceedings of the National Academy of Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Che, Haihong, Goldstein, Melvyn L., Diamond, Patrick H., and Sagdeev, Roald Z. How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission. United States: N. p., 2017.
Web. doi:10.1073/pnas.1614055114.
Che, Haihong, Goldstein, Melvyn L., Diamond, Patrick H., & Sagdeev, Roald Z. How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission. United States. https://doi.org/10.1073/pnas.1614055114
Che, Haihong, Goldstein, Melvyn L., Diamond, Patrick H., and Sagdeev, Roald Z. Mon .
"How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission". United States. https://doi.org/10.1073/pnas.1614055114.
@article{osti_1341768,
title = {How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission},
author = {Che, Haihong and Goldstein, Melvyn L. and Diamond, Patrick H. and Sagdeev, Roald Z.},
abstractNote = {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 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 reexcites small-scale Langmuir waves; this process closes a feedback loop that maintains the continuous coherent emission.},
doi = {10.1073/pnas.1614055114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 7,
volume = 114,
place = {United States},
year = {Mon Jan 30 00:00:00 EST 2017},
month = {Mon Jan 30 00:00:00 EST 2017}
}
Free Publicly Available Full Text
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https://doi.org/10.1073/pnas.1614055114
https://doi.org/10.1073/pnas.1614055114
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Cited by: 24 works
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