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Comparison of linear modes in kinetic plasma models

Part of: Fundamental Problems of Plasma Astrophysics

Published online by Cambridge University Press:  03 April 2017

Enrico Camporeale  and
David Burgess
Enrico Camporeale*
Affiliation:
Center for Mathematics and Computer Science (CWI), Amsterdam, The Netherlands
David Burgess
Affiliation:
School of Physics and Astronomy, Queen Mary University of London, London, UK
*
†Email address for correspondence: e.camporeale@cwi.nl
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Abstract

We compare, in an extensive and systematic way, linear theory results obtained with the hybrid (ion kinetic and electron fluid), the gyrokinetic and the fully kinetic plasma models. We present a test case with parameters that are relevant for solar wind turbulence at small scales, which is a topic now recognized to need a kinetic treatment, to a certain extent. We comment on the comparison of low-frequency single modes (Alfvén/ion-cyclotron, ion-acoustic and fast modes) for a wide range of propagation angles, and on the overall spectral properties of the linear operators, for quasi-perpendicular propagation. The methodology and the results presented in this paper will be valuable when choosing which model should be used in regimes where the assumptions of each model are not trivially satisfied.

Keywords

plasma wavesspace plasma physics
Type
Research Article
Information
Journal of Plasma Physics , Volume 83 , Issue 2 , April 2017 , 535830201
Copyright
© Cambridge University Press 2017 

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