Exponentially Growing Tearing Modes in Rijnhuizen Tokamak Project Plasmas

F. Salzedas, F. C. Schüller, A. A. M. Oomens, and the RTP Team
Phys. Rev. Lett. 88, 075002 – Published 5 February 2002
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Abstract

The local measurement of the island width w, around the resonant surface, allowed a direct test of the extended Rutherford model [P. H. Rutherford, PPPL Report-2277 (1985)], describing the evolution of radiation-induced tearing modes prior to disruptions of tokamak plasmas. It is found that this model accounts very well for the observed exponential growth and supports radiation losses as being the main driving mechanism. The model implies that the effective perpendicular electron heat conductivity in the island is smaller than the global one. Comparison of the local measurements of w with the magnetic perturbed field B̃ showed that wB̃1/2 was valid for widths up to 18% of the minor radius.

  • Received 14 March 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.075002

©2002 American Physical Society

Authors & Affiliations

F. Salzedas*, F. C. Schüller, A. A. M. Oomens, and the RTP Team

  • FOM-Instituut voor Plasmafysica “Rijnhuizen,” Association Euratom-FOM, Trilateral Euregio Cluster, P.O. Box 1207, 3430 BE Nieuwegein, The Netherlands

  • *Present address: Centro de Fusão Nuclear, Association Euratom-IST, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. Electronic address: fsal@cfn.ist.utl.pt

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Vol. 88, Iss. 7 — 18 February 2002

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