Up-down symmetry of the turbulent transport of toroidal angular momentum in tokamaks

Details Up-down symmetry of the turbulent transport of toroidal angular momentum in tokamaks Up-down symmetry of the turbulent transport of toroidal angular momentum in tokamaks

2011-02-17

arxiv.org/abs/1102.3717v2

Phys. Plasmas 18, 062501 (2011)

Physics

Plasma Physics

15 pages, 2 figures

Scientific paper

Two symmetries of the local nonlinear delta-f gyrokinetic system of equations in tokamaks in the high flow regime are presented. The turbulent transport of toroidal angular momentum changes sign under an up-down reflection of the tokamak and a sign change of both the rotation and the rotation shear. Thus, the turbulent transport of toroidal angular momentum must vanish for up-down symmetric tokamaks in the absence of both rotation and rotation shear. This has important implications for the modeling of spontaneous rotation.

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