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Title: X-point position dependence of edge intrinsic toroidal rotation on the Tokamak à Configuration Variable

Abstract

Recent theoretical work predicts intrinsic toroidal rotation in the tokamak edge to depend strongly on the normalized major radial position of the X-point. With this motivation, we conducted a series of Ohmic L-mode shots on the Tokamak à Configuration Variable, moving the X-point from the inboard to the outboard edge of the last closed flux surface in both lower and upper single null configurations. The edge toroidal rotation evolved from strongly co-current for an inboard X-point to either vanishing or counter-current for an outboard X-point, in agreement with the theoretical expectations. The whole rotation profile shifted roughly rigidly with the edge rotation, resulting in variation of the peak core rotation by more than a factor of two. Core rotation reversals had little effect on the edge rotation. Edge rotation was slightly more counter-current for unfavorable than favorable ∇B drift discharges.

Authors:
 [1]; ; ; ; ; ;  [2];  [3]
  1. Princeton University, Princeton, New Jersey 08544 (United States)
  2. École Polytechnique Fédérale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas (CRPP), CH-1015 Lausanne (Switzerland)
  3. Aix-Marseille Université, CNRS, PIIM UMR 7345, 13397 Marseille (France)
Publication Date:
OSTI Identifier:
22410396
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CONFIGURATION; COUNTER CURRENT; EDGE LOCALIZED MODES; L-MODE PLASMA CONFINEMENT; MAGNETIC SURFACES; ROTATING PLASMA; SPACE DEPENDENCE; TOKAMAK DEVICES

Citation Formats

Stoltzfus-Dueck, T., E-mail: tstoltzf@princeton.edu, Karpushov, A. N., Sauter, O., Duval, B. P., Labit, B., Reimerdes, H., Vijvers, W. A. J., and Camenen, Y. X-point position dependence of edge intrinsic toroidal rotation on the Tokamak à Configuration Variable. United States: N. p., 2015. Web. doi:10.1063/1.4921158.
Stoltzfus-Dueck, T., E-mail: tstoltzf@princeton.edu, Karpushov, A. N., Sauter, O., Duval, B. P., Labit, B., Reimerdes, H., Vijvers, W. A. J., & Camenen, Y. X-point position dependence of edge intrinsic toroidal rotation on the Tokamak à Configuration Variable. United States. doi:10.1063/1.4921158.
Stoltzfus-Dueck, T., E-mail: tstoltzf@princeton.edu, Karpushov, A. N., Sauter, O., Duval, B. P., Labit, B., Reimerdes, H., Vijvers, W. A. J., and Camenen, Y. Fri . "X-point position dependence of edge intrinsic toroidal rotation on the Tokamak à Configuration Variable". United States. doi:10.1063/1.4921158.
@article{osti_22410396,
title = {X-point position dependence of edge intrinsic toroidal rotation on the Tokamak à Configuration Variable},
author = {Stoltzfus-Dueck, T., E-mail: tstoltzf@princeton.edu and Karpushov, A. N. and Sauter, O. and Duval, B. P. and Labit, B. and Reimerdes, H. and Vijvers, W. A. J. and Camenen, Y.},
abstractNote = {Recent theoretical work predicts intrinsic toroidal rotation in the tokamak edge to depend strongly on the normalized major radial position of the X-point. With this motivation, we conducted a series of Ohmic L-mode shots on the Tokamak à Configuration Variable, moving the X-point from the inboard to the outboard edge of the last closed flux surface in both lower and upper single null configurations. The edge toroidal rotation evolved from strongly co-current for an inboard X-point to either vanishing or counter-current for an outboard X-point, in agreement with the theoretical expectations. The whole rotation profile shifted roughly rigidly with the edge rotation, resulting in variation of the peak core rotation by more than a factor of two. Core rotation reversals had little effect on the edge rotation. Edge rotation was slightly more counter-current for unfavorable than favorable ∇B drift discharges.},
doi = {10.1063/1.4921158},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}