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Microphysics of Cosmic Plasmas: Hierarchies of Plasma Instabilities from MHD to Kinetic
Swarthmore College, Swarthmore, PA 19081, USA.
Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, UK.
Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering. (Scientific Visualization)ORCID iD: 0000-0003-4055-0552
EPFL Lausanne, CH-1015 Lausanne, Switzerland.
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2014 (English)In: MICROPHYSICS OF COSMIC PLASMAS / [ed] André Balogh, Andrei Bykov, Peter Cargill, Richard DendyThierry and Dudok de WitJohn Raymond, Springer Netherlands, 2014, 1, p. 281-307Chapter in book (Refereed)
Abstract [en]

In this article, we discuss the idea of a hierarchy of instabilities that can rapidly couple the disparate scales of a turbulent plasma system. First, at the largest scale of the system, L, current carrying flux ropes can undergo a kink instability. Second, a kink instability in adjacent flux ropes can rapidly bring together bundles of magnetic flux and drive reconnection, introducing a new scale of the current sheet width, , perhaps several ion inertial lengths (δ i ) across. Finally, intense current sheets driven by reconnection electric fields can destabilize kinetic waves such as ion cyclotron waves as long as the drift speed of the electrons is large compared to the ion thermal speed, v D v i . Instabilities such as these can couple MHD scales to kinetic scales, as small as the proton Larmor radius, ρ i .

Place, publisher, year, edition, pages
Springer Netherlands, 2014, 1. p. 281-307
Series
Space Science Series of ISSI, ISSN 1385-7525 ; 47
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-161019DOI: 10.1007/978-1-4899-7413-6_11ISBN: 9781489974129 (print)ISBN: 9781489974136 (electronic)OAI: oai:DiVA.org:liu-161019DiVA, id: diva2:1361807
Available from: 2019-10-17 Created: 2019-10-17 Last updated: 2019-10-17Bibliographically approved

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Dieckmann, Mark E

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