Scaling of Spontaneous Rotation with Temperature and Plasma Current in Tokamaks

TitleScaling of Spontaneous Rotation with Temperature and Plasma Current in Tokamaks
Publication TypeJournal Article
Year of Publication2012
AuthorsF.I Parra, MFF Nave, A.A Schekochihin, C. Giroud, J.S de Grassie, J.HF Severo, P. de Vries, K.D Zastrow
JournalPhysical Review Letters
Volume108
Issue9
Pagination095001
Date PublishedFeb
Type of ArticleArticle
ISBN Number0031-9007
KeywordsMODE, TCV TOKAMAK, TRANSPORT, TURBULENCE
Abstract

Using theoretical arguments, a simple scaling law for the size of the intrinsic rotation observed in tokamaks in the absence of a momentum injection is found: The velocity generated in the core of a tokamak must be proportional to the ion temperature difference in the core divided by the plasma current, independent of the size of the device. The constant of proportionality is of the order of 10 km . s(-1) . MA . keV(-1). When the intrinsic rotation profile is hollow, i.e., it is countercurrent in the core of the tokamak and cocurrent in the edge, the scaling law presented in this Letter fits the data remarkably well for several tokamaks of vastly different size and heated by different mechanisms.

URLhttp://arxiv.org/abs/1108.6106
DOI10.1103/PhysRevLett.108.095001
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0d39c3c43a78abfdbe55c46e523a5c18

Alternate TitlePhys. Rev. Lett.

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