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Abstract

Global gyrokinetic particle simulations have been used to search tokamak configurations which are stable against the ion-temperature-gradient-driven (ITG) modes commonly held responsible for the core anomalous ion heat transport. The stable configurations are characterized by strongly reduced or reversed drifts on the low-field side. Since excellent transport properties have been observed in high poloidal beta tokamak experiments, we conjecture, as a result of our simulations, that this may be due to the stabilization of ITG modes by the reduction of the drifts.

Additional information

Authors: FIVAZ M, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse (CH);TRAN T M, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse (CH);APPERT K, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse (CH);VACLAVIK J, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse (CH);PARKER S E, University of Colorado, Department of Physics, Boulder (US)
Bibliographic Reference: Article: Physical Review Letters, Vol. 78 (1997) No. 18, pp. 3471-3474
Record Number: 199711287 / Last updated on: 1997-10-10
Category: PUBLICATION
Original language: en
Available languages: en