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Physics > Plasma Physics

arXiv:1103.2867 (physics)
[Submitted on 15 Mar 2011 (v1), last revised 13 Jul 2011 (this version, v2)]

Title:A theory of non-local linear drift wave transport

Authors:S. Moradi, J. Anderson, B. Weyssow
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Abstract:Transport events in turbulent tokamak plasmas often exhibit non-local or non-diffusive action at a distance features that so far have eluded a conclusive theoretical description. In this paper a theory of non-local transport is investigated through a Fokker-Planck equation with fractional velocity derivatives. A dispersion relation for density gradient driven linear drift modes is derived including the effects of the fractional velocity derivative in the Fokker-Planck equation. It is found that a small deviation (a few percent) from the Maxwellian distribution function alters the dispersion relation such that the growth rates are substantially increased and thereby may cause enhanced levels of transport.
Comments: 22 pages, 2 figures. Manuscript submitted to Physics of Plasmas
Subjects: Plasma Physics (physics.plasm-ph); Mathematical Physics (math-ph)
Cite as: arXiv:1103.2867 [physics.plasm-ph]
  (or arXiv:1103.2867v2 [physics.plasm-ph] for this version)
  https://doi.org/10.48550/arXiv.1103.2867
Journal reference: Physics of Plasmas 18, 062106 (2011)
Related DOI: https://doi.org/10.1063/1.3598295

Submission history

From: Johan Anderson [view email]
[v1] Tue, 15 Mar 2011 09:55:23 UTC (287 KB)
[v2] Wed, 13 Jul 2011 08:55:54 UTC (287 KB)
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