A theory of non-local linear drift wave transport
Journal article, 2011

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.

plasma toroidal confinement

dispersion relations

Fokker-Planck equation

plasma turbulence

plasma drift waves

plasma transport processes

Maxwell equations

tokamak devices


Sara Moradi

Chalmers, Applied Physics, Nuclear Engineering

Johan Anderson

Chalmers, Applied Physics, Nuclear Engineering

B Weyssov

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 18 6 062106- 062106

Driving Forces

Sustainable development

Areas of Advance



Basic sciences

Subject Categories

Fusion, Plasma and Space Physics



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