X-Point-Position-Dependent Intrinsic Toroidal Rotation in the Edge of the TCV Tokamak
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Updated: Apr 6, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
Published on: May 19, 2014
T Stoltzfus-Dueck1, A N Karpushov2, O Sauter2
1Princeton University, Princeton, New Jersey 08544, USA.
Abstract:
Edge intrinsic rotation was investigated in Ohmic L-mode discharges on the Tokamak à Configuration Variable, scanning the major radial position of the X point, R(X). Edge rotation decreased linearly with increasing R(X), 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 ∇B shots.
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