New tokamak plasma regime with stationary temperature oscillations

G. Giruzzi, F. Imbeaux, J.L. Ségui, X. Garbet, G.T.A. Huysmans, J.F. Artaud, A. Bécoulet, G.T. Hoang, X. Litaudon, P. Maget, B. Saoutic

Research output: Contribution to journalArticleAcademicpeer-review

69 Citations (Scopus)

Abstract

During noninductively driven discharges in the Tore Supra tokamak, steady sinusoidal oscillations of the central electron temperature, lasting as long as 2min, have been observed for the first time. Having no helical structure, they cannot be ascribed to any known MHD instability. The most plausible explanation of this new phenomenon is that the plasma current density and the electron temperature evolve as a nonlinearly coupled predator-prey system. This interpretation is supported by the numerical solution of coupled resistive current diffusion and heat transport equations.
Original languageEnglish
Pages (from-to)135001
JournalPhysical Review Letters
Volume91
Issue number13
DOIs
Publication statusPublished - 1 Sep 2003
Externally publishedYes

Keywords

  • Transport properties
  • Tokamaks spherical tokamaks

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