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A theory of non-local linear drift wave transport
- Source :
- Physics of Plasmas 18, 062106 (2011)
- Publication Year :
- 2011
-
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.<br />Comment: 22 pages, 2 figures. Manuscript submitted to Physics of Plasmas
- Subjects :
- Physics - Plasma Physics
Mathematical Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Physics of Plasmas 18, 062106 (2011)
- Publication Type :
- Report
- Accession number :
- edsarx.1103.2867
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/1.3598295