Intrinsic rotation driven by non-maxwellian equilibria in tokamak plasmas

M. Barnes, F. I. Parra, J. P. Lee, E. A. Belli, M. F.F. Nave, A. E. White

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The effect of small deviations from a Maxwellian equilibrium on turbulent momentum transport in tokamak plasmas is considered. These non-Maxwellian features, arising from diamagnetic effects, introduce a strong dependence of the radial flux of cocurrent toroidal angular momentum on collisionality: As the plasma goes from nearly collisionless to weakly collisional, the flux reverses direction from radially inward to outward. This indicates a collisionality- dependent transition from peaked to hollow rotation profiles, consistent with experimental observations of intrinsic rotation.

Original languageEnglish (US)
Article number055005
JournalPhysical review letters
Issue number5
StatePublished - Aug 1 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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