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Abstract

In the TCV tokamak, the m/n = 2/1 island is observed in low-density discharges with central electron cyclotron current drive. The evolution of its width has two distinct growth phases, one of which can be linked to a conventional tearing mode driven unstable by the current profile and the other to a neoclassical tearing mode driven by a perturbation of the bootstrap current. The TCV results provide the first clear observation of such a destabilization mechanism and reconcile the theory of conventional and neoclassical tearing modes, which only differ in their dominant driving term.

A modified version of this paper was published as a http://icadc.cordis.lu/fep-cgi/srchidadb?ACTION=D&SESSION=&RCN=200215181&CALLER=PUBL_LIB (journal article).

Additional information

Authors: REIMERDES H, Tcole Polytechnique F?d?rale de Lausanne, Centre de Recherches en Physique des Plasmas, Lausanne (CH) and General Atomics, San Diego, California (US);SAUTER O, Tcole Polytechnique F?d?rale de Lausanne, Centre de Recherches en Physique des Plasmas, Lausanne (CH);GOODMAN T, Tcole Polytechnique F?d?rale de Lausanne, Centre de Recherches en Physique des Plasmas, Lausanne (CH);POCHELON A, Tcole Polytechnique F?d?rale de Lausanne, Centre de Recherches en Physique des Plasmas, Lausanne (CH);REIMERDES H, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);SAUTER O, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);GOODMAN T, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);POCHELON A, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: EPFL Internal report LRP 716/01, December 2001. 10pp.
Availability: Available free of charge from: École Polytechnique Fédérale de Lausanne (EPFL), Ecublens, CH-1015 Lausanne Fax +41-21-6934747 Available online at: http://crppwww.epfl.ch/archives/
ISBN: ISSN 0458-5895
Record Number: 200114212 / Last updated on: 2003-11-20
Category: PUBLICATION
Original language: en
Available languages: en