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A Key to Improved Ion Core Confinement in the JET Tokamak: Ion Stiffness Mitigation due to Combined Plasma Rotation and Low Magnetic Shear

Author
Abstract

New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from the combined effect of high rotational shear and low magnetic shear. The observations have important implications for the understanding of improved ion core confinement in advanced tokamak scenarios. Simulations using quasilinear fluid and gyrofluid models show features of stiffness mitigation, while nonlinear gyrokinetic simulations do not. The JET experiments indicate that advanced tokamak scenarios in future devices will require sufficient rotational shear and the capability of q profile manipulation.

Year of Publication
2011
Journal
Physical Review Letters
Volume
107
Number
13
Issue
13
Number of Pages
135004
Date Published
Sep
Type of Article
Article
ISBN Number
0031-9007
URL
http://purl.tue.nl/11399973048620600.pdf
DOI
10.1103/PhysRevLett.107.135004
PId
e071481b46251293c570437edddbc5ab
Alternate Journal
Phys. Rev. Lett.
Label
OA
Journal Article
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