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The non-linear evolution and saturation of tearing modes is described in the small magnetic island width limit by a new approach that is rigorous, simple, and accurate. Within the usual asymptotic matching technique, a new scaling ansatz avoids the use of the traditional j = j(Psi) approach, and reduces the non-linear problem to an elementary linear one. The newly calculated island width is in excellent agreement with available numerical simulations. Tearing mode saturation is interpreted as produced by a local dynamo providing the current sheet required by global magnetic features.

Additional information

Authors: ESCANDE D F, UMR 6633 CNRS-Université de Provence, case 321, Centre de Saint-JérômeMarseille (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 Letters A 323 (2004) 278�284
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Record Number: 200417486 / Last updated on: 2004-04-26
Original language: en
Available languages: en