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- Title
Linear gyrokinetics of electron–positron plasmas in closed field-line systems.
- Authors
Kennedy, D.; Mishchenko, A.; Xanthopoulos, P.; Helander, P.; Navarro, A. Bañón; Görler, T.
- Abstract
Linear gyrokinetic simulations of magnetically confined electron–positron plasmas are performed for the first time in the geometry and parameter regimes likely to be relevant for upcoming laboratory experiments. In such plasmas, the density will be sufficiently small as to render the plasma effectively collisionless. The magnetic field will be very large, meaning that the Debye length will exceed the gyroradius by a few orders of magnitude. We show the results of linear simulations in flux tubes close to the current carrying ring and also in the bulk of the plasma, demonstrating the existence of entropy modes and interchange modes in pair plasmas. We study linear stability and show that in the relevant configurations, almost complete linear stability is attainable in large swathes of parameter space.
- Subjects
ELECTRON-positron plasmas; DEBYE length; PLASMA confinement; PLASMA instabilities; POSITRONS; LARMOR radius; COLLISIONLESS plasmas
- Publication
Journal of Plasma Physics, 2020, Vol 86, Issue 2, p1
- ISSN
0022-3778
- Publication type
Article
- DOI
10.1017/S0022377820000276