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Full-scale simulation study of stimulated electromagnetic emissions: The first ten milliseconds
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2010 (English)In: Journal of Plasma Physics, ISSN 0022-3778, E-ISSN 1469-7807, Vol. 78, no 3-4, 369-375 p.Article in journal (Refereed) Published
Abstract [en]

A full-scale numerical study is performed of the nonlinear interaction between a large-amplitude electromagnetic wave and the Earth's ionosphere, and of the stimulated electromagnetic emission emerging from the turbulent layer, during the first 10 milliseconds after switch-on of the radio transmitter. The frequency spectra are downshifted in frequency and appear to emerge from a region somewhat below the cutoff of the O mode, which is characterized by Langmuir wave turbulence and localized Langmuir envelopes trapped in ion density cavities. The spectral features of escaping O-mode waves are very similar to those observed in experiments. The frequency components of Z-mode waves, trapped in the region between the O- and Z-mode cutoffs show strongly asymmetric and downshifted spectra.

Place, publisher, year, edition, pages
2010. Vol. 78, no 3-4, 369-375 p.
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-38757DOI: 10.1017/S0022377809990559ISI: 000278169300015OAI: oai:DiVA.org:umu-38757DiVA: diva2:381457
Available from: 2010-12-27 Created: 2010-12-27 Last updated: 2017-12-11Bibliographically approved

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Eliasson, BengtStenflo, Lennart
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