skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
ORCiD logo [1];  [2];  [3];  [4]
  1. Univ. of Maryland, College Park, MD (United States). Dept. of Astronomy; NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Heliospheric Physics Lab.
  2. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States). Heliospheric Physics Lab.
  3. Univ. of California, San Diego, CA (United States). Dept. of Physics
  4. Univ. of Maryland, College Park, MD (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE; National Aeronautic and Space Administration (NASA)
OSTI Identifier:
1341768
Alternate Identifier(s):
OSTI ID: 1465122
Grant/Contract Number:  
FG02-04ER54738; NNG04EB99C
Resource Type:
Journal Article: Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 114; Journal Issue: 7; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
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. doi: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. doi: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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1073/pnas.1614055114

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share: