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Abstract

Strong electric field, generate an ExB rotation of the equilibrium plasma Experiments have shown that this effect could lower the anomalous transport in tokamaks. The study of the effect of these flows on the linear stability of ion temperature gradient (ITG) modes has therefore been undertaken. The question is addressed solving the spectrum of the gyrokinetic equation in the full two-dimensional poloidal plane. Results show a strong stabilizing effect of E x B flows on the ITG modes. Study with respect to different profiles of the flow shows that the so-called curvature of flow (second derivative) has no effect, while the intensity of flow itself produces the strongest effect. Study with respect to different magnetic shears did not lead to a discovery of any particular behaviour of the negative magnetic shear cases. Eventually, we conducted an experimental comparison with the Asdex Upgrade tokamak in Garching.

Additional information

Authors: MACCIO M, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confederation Suisse;VACLAVIC J, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confederation Suisse;VILLARD L, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confederation Suisse
Bibliographic Reference: Article: Plasma Physics, (2000), LPR 667/00, 39pp.
ISBN: ISSN: 0458-5895
Record Number: 200012917 / Last updated on: 2000-12-18
Category: PUBLICATION
Original language: en
Available languages: en