X-Point-Position-Dependent Intrinsic Toroidal Rotation in the Edge of TCV

Edge intrinsic rotation was investigated in Ohmic L-mode discharges on the Tokamak a Configuration Variable, scanning the major radial position of the X point, R-X. 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 del B shots.


Published in:
Physical Review Letters, 114, 245001
Year:
2015
Publisher:
American Physical Society
ISSN:
0031-9007
Laboratories:
SPC
CRPP




 Record created 2015-06-18, last modified 2018-12-03

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