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Localized excitations in a nonlinearly coupled magnetic drift wave-zonal flow system
Umeå University, Faculty of Science and Technology, Department of Physics. Grupo de Lasers e Plasmas, Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Portugal.
Umeå University, Faculty of Science and Technology, Department of Physics. Max-Planck Institut für extraterrestrische Physik, Garching, Germany; Grupo de Lasers e Plasmas, Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Portugal; Science and Technology Facilities Council (STFC) Centre for Fundamental Physics, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton, Didcot, Oxfordshire, United Kingdom; Scottish Universities of Physics Alliance (SUPA), Department of Physics, University of Strathclyde, Glasgow, Scotland, United Kingdom; School of Physics, University of KwaZulu-Natal, Durban, South Africa.
2010 (English)In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 374, no 13-14, 1514-1516 p.Article in journal (Refereed) Published
Abstract [en]

We consider the amplitude modulation of the magnetic drift wave (MOW) by zonal flows (ZFs) in a nonuniform magnetoplasma. For this purpose, we use the two-fluid model to derive a nonlinear Schrodinger equation for the amplitude modulated MDWs in the presence of the ZF potential, and an evolution equation for the ZF potential which is reinforced by the nonlinear Lorentz force of the MDWs. Our nonlinearly coupled MDW-ZFs system of equations admits stationary solutions in the form of a localized MDW envelope and a shock-like ZF potential profile.

Place, publisher, year, edition, pages
Elsevier, 2010. Vol. 374, no 13-14, 1514-1516 p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:umu:diva-109634DOI: 10.1016/j.physleta.2010.01.050ISI: 000276144400021OAI: oai:DiVA.org:umu-109634DiVA: diva2:858590
Available from: 2015-10-02 Created: 2015-10-02 Last updated: 2017-12-01Bibliographically approved

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