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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.
Linköpings universitet, Institutionen för teknik och naturvetenskap, Medie- och Informationsteknik. Linköpings universitet, Tekniska fakulteten. (Scientific Visualization)ORCID-id: 0000-0003-4055-0552
EPFL Lausanne, CH-1015 Lausanne, Switzerland.
Vise andre og tillknytning
2014 (engelsk)Inngår i: Microphysics of cosmic plasmas / [ed] André Balogh, Andrei Bykov, Peter Cargill, Richard DendyThierry and Dudok de WitJohn Raymond, Boston: Springer, 2014, 1, s. 281-307Kapittel i bok, del av antologi (Fagfellevurdert)
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 .

sted, utgiver, år, opplag, sider
Boston: Springer, 2014, 1. s. 281-307
Serie
Space Science Series of ISSI, ISSN 1385-7525 ; 47
Emneord [en]
MHD, Turbulence, Reconnection, Relaxation, Instability
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-161019DOI: 10.1007/978-1-4899-7413-6_11Libris ID: 9m827s9b7rr7w8k6ISBN: 9781489974129 (tryckt)ISBN: 9781489974136 (digital)OAI: oai:DiVA.org:liu-161019DiVA, id: diva2:1361807
Tilgjengelig fra: 2019-10-17 Laget: 2019-10-17 Sist oppdatert: 2019-12-10bibliografisk kontrollert

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