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Abstract

It is shown that local features of the equilibrium current density profile, i.e., its gradient and curvature evaluated at the resonant magnetic surface, can modify considerably the linear behaviour of tearing modes. These features can become particularly important in cylindrical geometry, at moderate values of the electrical resistance and of the tearing stability parameter, D8. A new analytic dispersion relation is derived, which takes into account in a consistent way these new terms and which agrees very well with numerically computed growth rates.

Additional information

Authors: MILITELLO F, INFM and Politecnico di Torino, Burning Plasma Research Group, Torino (IT);PORCELLI F, INFM and Politecnico di Torino, Burning Plasma Research Group, Torino (IT);HUYSMANS G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);OTTAVIANI M, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Physics of Plasmas Volume 11, Number 1 January 2004
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://www.pppl.gov/physplas/
Record Number: 200417485 / Last updated on: 2004-04-26
Category: PUBLICATION
Original language: en
Available languages: en