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

TitleA Key to Improved Ion Core Confinement in the JET Tokamak: Ion Stiffness Mitigation due to Combined Plasma Rotation and Low Magnetic Shear
Publication TypeJournal Article
Year of Publication2011
AuthorsP. Mantica, C. Angioni, C. Challis, G. Colyer, L. Frassinetti, N. Hawkes, T. Johnson, M. Tsalas, P.C de Vries, J. Weiland, B. Baiocchi, M.NA Beurskens, A.CA Figueiredo, C. Giroud, J. Hobirk, E. Joffrin, E. Lerche, V. Naulin, A.G. Peeters, A. Salmi, C. Sozzi, D. Strintzi, G. Staebler, T. Tala, D. Van Eester, T. Versloot
JournalPhysical Review Letters
Volume107
Issue13
Number13
Pagination135004
Date PublishedSep
Type of ArticleArticle
ISBN Number0031-9007
KeywordsMODES, THERMAL TRANSPORT, TRANSPORT BARRIERS, TURBULENCE SIMULATIONS
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.

URLhttp://purl.tue.nl/11399973048620600.pdf
DOI10.1103/PhysRevLett.107.135004
Division

FP

Department

PDG

PID

e071481b46251293c570437edddbc5ab

Alternate TitlePhys. Rev. Lett.
LabelOA

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