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Strong space plasma magnetic barriers and Alfvenic collapse
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2007 (English)In: JETP Letters: Journal of Experimental And Theoretical Physics Letters, ISSN 0021-3640, E-ISSN 1090-6487, Vol. 85, no 5, 236-241 p.Article in journal (Refereed) Published
Abstract [en]

High-magnitude magnetic barriers in space and solar plasma are proposed to be attributed to the pile up of magnetic field lines and their Alfvenic collapse for MHD flows. The analysis of experimental data from both the Interball and Cluster spacecrafts shows that high-magnitude magnetic structures found in the Earth magnetosheath and near the magnetopause are supported by a nearly thermal transverse plasma flow, with the minimum barrier width being on the order of the ion gyroradius. The collapse termination at such scales can be explained by the balance between the pile up of magnetic field lines and backward finite-gyroradius diffusion. Comparison between the theoretical, modeling, and experimental data shows that the Alfvenic collapse is, in general, a promising mechanism for magnetic field generation and plasma separation.

Place, publisher, year, edition, pages
2007. Vol. 85, no 5, 236-241 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-150859DOI: 10.1134/S0021364007050049ISI: 000246355700004OAI: oai:DiVA.org:uu-150859DiVA: diva2:409001
Available from: 2011-04-06 Created: 2011-04-06 Last updated: 2017-12-11Bibliographically approved

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Swedish Institute of Space Physics, Uppsala Division
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