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Electromagnetic coupling of localized upper hybrid oscillations in a system of density depletions
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
2009 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 16, no 1, 012902- p.Article in journal (Refereed) Published
Abstract [en]

One of the most important effects of pumping the ionospheric plasma by a powerful high frequency electromagnetic wave from the ground is the excitation of filamentary density irregularities. These striations are density depletions which contain localized upper hybrid oscillations. The upper hybrid oscillations radiate Z mode waves that escape from the depletions and can therefore scatter on neighboring depletions, which provides a means for electromagnetic interaction between different striations. The physics of a Z mode wave scattering on a single density depletion is studied analytically in one dimension. At resonance the incident Z mode wave is totally reflected from the irregularity. The treatment of many parallel striations interacting through the Z mode radiation shows that different scattering processes are involved to excite the even and odd modes of the localized upper hybrid oscillations.

Place, publisher, year, edition, pages
2009. Vol. 16, no 1, 012902- p.
Keyword [en]
electromagnetic coupling, ionosphere, plasma density, plasma instability, plasma oscillations
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-137324DOI: 10.1063/1.3068744ISI: 000262967900027OAI: oai:DiVA.org:uu-137324DiVA: diva2:378178
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

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Department of Astronomy and Space PhysicsSwedish Institute of Space Physics, Uppsala Division
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