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Microphysics of Cosmic Plasmas: Hierarchies of Plasma Instabilities from MHD to Kinetic
Swarthmore College, PA, USA. (Department of Physics and Astronomy)
University of Manchester, UK. (Jodrell Bank Ctr. Astrophys)
Linköpings universitet, Institutionen för teknik och naturvetenskap, Medie- och Informationsteknik. Linköpings universitet, Tekniska högskolan. (Scientific Visualization)ORCID-id: 0000-0003-4055-0552
Ecole Polytechnique Federal de Lausanne, Switzerland . (CRPP, Ctr Rech Phys Plasmas)
Vise andre og tillknytning
2013 (engelsk)Inngår i: Space Science Reviews, ISSN 0038-6308, E-ISSN 1572-9672, Vol. 178, nr 2-4, s. 357-383Artikkel, forskningsoversikt (Fagfellevurdert) Published
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
Springer Netherlands, 2013. Vol. 178, nr 2-4, s. 357-383
Emneord [en]
Laboratory plasma, PIC simulations, MHD, Turbulence, Reconnection, Relaxation, Instability
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-100120DOI: 10.1007/s11214-013-0005-7ISI: 000326110700011OAI: oai:DiVA.org:liu-100120DiVA, id: diva2:659807
Forskningsfinansiär
Swedish Research Council, 2010-4063Tilgjengelig fra: 2013-10-28 Laget: 2013-10-28 Sist oppdatert: 2017-12-06bibliografisk kontrollert

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