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Title: Modulational interaction between the short-wavelength lower-hybrid waves and slow, large-scale density fluctuations

Abstract

Conditions are formulated for modulational instability of two modes with disparate time and space scales, and the modulational interaction of fast and short-wavelength lower-hybrid waves with slow, large-scale inertial Alfven and ion-acoustic waves is analyzed. Instability is driven by Reynolds' stresses exerted on plasma by the lower-hybrid waves. Reynolds' stresses lead to the formation of background density modulations in which the lower-hybrid wave can be localized. It is concluded that the lower-hybrid solitary structures observed in the auroral ionosphere can be created by Reynolds' stresses of the lower-hybrid waves. In many respects, the observed structures exhibit properties of wave localizations that result from modulational instability.

Authors:
;  [1];  [2]
  1. Foundations Development, Sabanci University, Istanbul 34956 (Turkey)
  2. (United States)
Publication Date:
OSTI Identifier:
20782341
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 12; Journal Issue: 11; Other Information: DOI: 10.1063/1.2135770; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; FLUCTUATIONS; ION ACOUSTIC WAVES; IONOSPHERE; LOWER HYBRID CURRENT DRIVE; LOWER HYBRID HEATING; MODULATION; PLASMA; PLASMA DENSITY; PLASMA INSTABILITY; REYNOLDS NUMBER; SOLITONS; STRESSES; WAVELENGTHS

Citation Formats

Uecer, Defne, Shapiro, Vitali D., and Physics Department, University of California San Diego, La Jolla, California 92093. Modulational interaction between the short-wavelength lower-hybrid waves and slow, large-scale density fluctuations. United States: N. p., 2005. Web. doi:10.1063/1.2135770.
Uecer, Defne, Shapiro, Vitali D., & Physics Department, University of California San Diego, La Jolla, California 92093. Modulational interaction between the short-wavelength lower-hybrid waves and slow, large-scale density fluctuations. United States. doi:10.1063/1.2135770.
Uecer, Defne, Shapiro, Vitali D., and Physics Department, University of California San Diego, La Jolla, California 92093. Tue . "Modulational interaction between the short-wavelength lower-hybrid waves and slow, large-scale density fluctuations". United States. doi:10.1063/1.2135770.
@article{osti_20782341,
title = {Modulational interaction between the short-wavelength lower-hybrid waves and slow, large-scale density fluctuations},
author = {Uecer, Defne and Shapiro, Vitali D. and Physics Department, University of California San Diego, La Jolla, California 92093},
abstractNote = {Conditions are formulated for modulational instability of two modes with disparate time and space scales, and the modulational interaction of fast and short-wavelength lower-hybrid waves with slow, large-scale inertial Alfven and ion-acoustic waves is analyzed. Instability is driven by Reynolds' stresses exerted on plasma by the lower-hybrid waves. Reynolds' stresses lead to the formation of background density modulations in which the lower-hybrid wave can be localized. It is concluded that the lower-hybrid solitary structures observed in the auroral ionosphere can be created by Reynolds' stresses of the lower-hybrid waves. In many respects, the observed structures exhibit properties of wave localizations that result from modulational instability.},
doi = {10.1063/1.2135770},
journal = {Physics of Plasmas},
number = 11,
volume = 12,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2005},
month = {Tue Nov 15 00:00:00 EST 2005}
}