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Physics of Plasmas : Reduction of chaotic particle transport driven by drift waves in sheared flows

By F. A. Marcus, I. L. Caldas, Z. O. Guimarães-Filho, P. J. Morrison, W. Horton et al

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Book Id: WPLBN0002169634
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 7 November 2008

Title: Physics of Plasmas : Reduction of chaotic particle transport driven by drift waves in sheared flows  
Author: F. A. Marcus, I. L. Caldas, Z. O. Guimarães-Filho, P. J. Morrison, W. Horton et al
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Physics of Plasmas Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Marcus, I. L. Caldas, Z. O. Guimarães-Filho, P. J. Morrison, W. Horton Et A, F. A. (n.d.). Physics of Plasmas : Reduction of chaotic particle transport driven by drift waves in sheared flows. Retrieved from http://www.worldjournal.org/


Description
Description: Investigations of chaotic particle transport by drift waves propagating in the edge plasma of tokamaks with poloidal zonal flow are described. For large aspect ratio tokamaks, the influence of radial electric field profiles on convective cells and transport barriers, created by the nonlinear interaction between the poloidal flow and resonant waves, is investigated. For equilibria with edge shear flow, particle transport is seen to be reduced when the electric field shear is reversed. The transport reduction is attributed to the robust invariant tori that occur in nontwist Hamiltonian systems. This mechanism is proposed as an explanation for the transport reduction in Tokamak Chauffage Alfvén Brésilien [ R. M. O. Galvão et al., Plasma Phys. Controlled Fusion 43, 1181 (2001) ] for discharges with a biased electrode at the plasma edge.

 
 


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