Scaling of spontaneous rotation with temperature and plasma current in tokamaks

F. I. Parra, M. F.F. Nave, A. A. Schekochihin, C. Giroud, J. S. De Grassie, J. H.F. Severo, P. De Vries, K. D. Zastrow

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

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 10km•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.

Original languageEnglish (US)
Article number095001
JournalPhysical review letters
Volume108
Issue number9
DOIs
StatePublished - Feb 29 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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