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Dispersion relation as a channel of Plasma turbulence evolution

Comişel, H. and Narita, Y. and Motschmann, U. (2015) Dispersion relation as a channel of Plasma turbulence evolution. Earth, Planets and Space, 67 (32), pp. 1-9. Springer. doi: 10.1186/s40623-015-0191-5. ISSN 1343-8832.

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We present evidence from ion-scale plasma turbulence simulations that normal-mode waves and sideband waves co-exist when a plasma evolves from wave fields into turbulence. Ion-scale fluctuations represent normal-mode fluctuations such as Bernstein and cyclotron modes, accompanied by sideband waves having moderate frequency mismatch with the normal modes. The evolution process is studied using the method of energy partition and frequency broadening. Wave evolution into turbulence exhibits distinct stages: growth phase of normal modes, saturation, and decay. The saturation time is of the order of 1000 ion gyroperiods, which is delayed at higher values of the plasma parameter beta. We conclude that the dispersion relations play the central role in plasma turbulence evolution, serving as the energy flux channel in the spectral domain.

Item URL in elib:https://elib.dlr.de/100825/
Document Type:Article
Title:Dispersion relation as a channel of Plasma turbulence evolution
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Comişel, H.Institut für Theoretische Physik, Technische Universität Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, GermanyUNSPECIFIED
Narita, Y.yasuhito.narita (at) oeaw.ac.atUNSPECIFIED
Motschmann, U.uwe.motschmann (at) dlr.deUNSPECIFIED
Journal or Publication Title:Earth, Planets and Space
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
DOI :10.1186/s40623-015-0191-5
Page Range:pp. 1-9
Keywords:Dispersion relation; Ion-scale plasma turbulence; Waves
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Kührt, Dr.rer.nat. Ekkehard
Deposited On:06 Jan 2016 16:30
Last Modified:19 Apr 2018 05:03

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