skip to main content

DOE PAGESDOE PAGES

Title: How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission

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:
Grant/Contract Number:
FG02-04ER54738; NNG04EB99C
Type:
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)
Research Org:
Univ. of California, San Diego, CA (United States)
Sponsoring Org:
USDOE; National Aeronautic and Space Administration (NASA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1341768
Alternate Identifier(s):
OSTI ID: 1465122