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Abstract

Stability limits for the ideal internal kink mode are calculated analytically for the Shafranov current profile using the large aspect ratio expansion. For equilibria with q(a) greater than 2 and circular cross-section, the maximum stable poloidal beta is below 0.1. In the absence of a conducting wall, an equilibrium with q(a) less than 2 is unstable at arbitrarily small positive poloidal beta or shear inside the q = 1 surface. The effects of non-circularity are discussed and quantitative results are given for elliptic cross-sections.

Additional information

Authors: BONDESON A, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne (CH);BUSSAC M-N, Centre de Physique Théorique, Ecole Polytechnique, Palaiseau (FR)
Bibliographic Reference: Article: Nuclear Fusion, Vol. 32 (1992) No. 3, pp. 513-517
Record Number: 199210738 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en