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Magnetosphere-ionosphere interactions - near-Earth manifestations of the plasma Universe
KTH, Superseded Departments, Alfvén Laboratory. KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
1988 (English)In: Astrophysics and Space Science, ISSN 0004640X, Vol. 144, 105-133 p.Article in journal (Refereed) Published
Abstract [en]

As the Universe consists almost entirely of plasma, the understanding of astrophysical phenomena must depend critically on our understanding of how matter behaves in the plasma state. In situ observations in the near-Earth cosmical plasma offer an excellent opportunity of gaining such understanding. The near-Earth cosmical plasma not only covers vast ranges of density and temperature, but is the site of a rich variety of complex plasma physical processes which are activated as a result of the interactions between the magnetosphere and the ionosphere. The geomagnetic field connects the ionosphere, tied by friction to the Earth, and the magnetosphere, dynamically coupled to the solar wind. This causes an exchange of energy and momentum between the two regions. The exchange is executed by magnetic-field aligned electric currents, the so-called Birkeland currents. Both directly and indirectly (through instabilities and particle acceleration) these also lead to an exchange of plasma, which is selective and therefore causes chemical separation. Another essential aspect of the coupling is the role of electric fields, especially magnetic-field aligned (’parallel’) electric fields, which have important consequences both for the dynamics of the coupling and, especially, for energization of charged particles. © 1988 Kluwer Academic Publishers.

Place, publisher, year, edition, pages
1988. Vol. 144, 105-133 p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-92953DOI: 10.1007/BF00793176OAI: oai:DiVA.org:kth-92953DiVA: diva2:514291
Note
cited By (since 1996) 0 NR 20140805Available from: 2012-04-07 Created: 2012-04-07 Last updated: 2012-04-07Bibliographically approved

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