Microphysics of Cosmic Plasmas: Hierarchies of Plasma Instabilities from MHD to KineticShow others and affiliations
2014 (English)In: Microphysics of cosmic plasmas / [ed] André Balogh, Andrei Bykov, Peter Cargill, Richard DendyThierry and Dudok de WitJohn Raymond, Boston: Springer, 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, ℓ, 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
Boston: Springer, 2014, 1. p. 281-307
Series
Space Science Series of ISSI, ISSN 1385-7525 ; 47
Keywords [en]
MHD, Turbulence, Reconnection, Relaxation, Instability
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-161019DOI: 10.1007/978-1-4899-7413-6_11Libris ID: 9m827s9b7rr7w8k6ISBN: 9781489974129 (print)ISBN: 9781489974136 (electronic)OAI: oai:DiVA.org:liu-161019DiVA, id: diva2:1361807
2019-10-172019-10-172019-12-10Bibliographically approved