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Abstract

During stationary H-mode (high-confinement) D(2)-discharges in the fusion experiment Tokamak à configuration variable (TCV) and magnetohydrodynamic (MHD)-instability, the so-called edge localized mode (ELM), leads to degradation of confinement and high peak power loads at the strike points of the diverted plasma. Magnetic measurements at the plasma edge show that coherent oscillations precede the actual radial transport of energy and particles. An analysis of the mode structure of the precursor oscillations, using measurements of toroidal and poloidal arrays of pick-up coils, reveals high mode numbers. The temporal and spatial growth of these modes is examined.

The observations are interpreted and compatibility with existing theories are discussed. .

Additional information

Authors: REIMERDES H, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Association Euratom Suisse (CH);POCHELON A, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Association Euratom Suisse (CH);SUTTROP W, MPI für Plasmaphysik, IPP-Euratom Association, Garching (DE)
Bibliographic Reference: Article: Proceedings de Printemps 1997 de la Société Suisse de Physique, Neuchâtel (FR), February 27-28, 1997
Record Number: 199710421 / Last updated on: 1997-04-23
Category: PUBLICATION
Original language: en
Available languages: en