RX-Dependent Intrinsic Toroidal Rotation in the Edge of TCV
Authors: T. Stoltzfus-Dueck, A.N. Karpushov, O. Sauter, B.P. Duval, H. Reimerdes, W.A.J. Vijvers, the TCV Team, and Y. Camenen
Abstract: Edge intrinsic rotation was investigated in Ohmic L-mode discharges on TCV, scanning the major radial position of the X-point, RX. Edge rotation decreased linearly with increasing RX, vanishing or becoming countercurrent for an outboard X-point, in agreement with theoretical expectations. The core rotation profile shifted fairly rigidly with the edge rotation, changing the central rotation speed by more than a factor of two. Core rotation reversals had little effect on the edge rotation velocity. Edge rotation was modestly more countercurrent in unfavorable than favorable ∇ Β shots.
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Submitted to: Physical Review Letters
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