Excitation of strong Langmuir turbulence in the ionosphere: Comparison of theory and observations

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860699· OSTI ID:6518506

DuBois, D F ^[1]; Hansen, A ^[2]; Rose, H A ^[1]; Russell, D ^[3]

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1. Theoretical Division, MS B262, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. University of Oslo, ITA, P.O. Box 1029, Blindern, N-0315, Oslo (Norway)
3. Lodestar Research Corporation, 2400 Central Avenue, Boulder, Colorado 80301 (United States)

The predictions of models of strong Langmuir turbulence (SLT) are compared with recent space- and time-resolved radar observations of the power spectra of turbulence induced in the ionosphere by powerful high-frequency (HF) waves. Distinct signatures of caviton dynamics, not predicted by the weak turbulence approximation, are seen in the observations. An improved model of the low-frequency fluctuations for equal electron and ion temperatures is presented as well as a discussion of density profile modification by the induced turbulence.

• OSTI ID: 6518506
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:7; ISSN PFBPEI; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

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& Magnetospheric Phenomena-- (1992-)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340 -- Plasma Waves
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EARTH ATMOSPHERE
ELECTRON TEMPERATURE
FLUCTUATIONS
ION TEMPERATURE
IONOSPHERE
PLANETARY IONOSPHERES
QUASI PARTICLES
SOLITONS
TURBULENCE
VARIATIONS