Periodic driving of plasma turbulence

M S Baptista, I L Caldas, M V A P Heller, A A Ferreira

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Tools to characterize three important characteristics of turbulence are proposed: Structures-within-structures, intermittent amplitude bursting, and turbulence complexity. These tools are applied to show that the injection of a rf wave into the plasma confined on the Tokamak Chauffage Alfven Bresilien (TCABR) [R. M. O. Galvao, V. Bellintani, Jr., R. D. Bengtson , Plasma Phys. Controlled Fusion 43, A299 (2001)] decreases plasma edge turbulence, although not completely destroy it, by destroying the only two types of time structures found in the data. Both structures present multiscaling spectra, with infinitely many possible scalings. So, according to this analysis, complexity of this turbulence is mainly due to the multiscaling character of the oscillations. (C) 2003 American Institute of Physics.

Original languageEnglish
Pages (from-to)1283-1290
Number of pages8
JournalPhysics of Plasmas
Volume10
Issue number5
DOIs
Publication statusPublished - May 2003

Keywords

  • self-similarity
  • edge
  • attractors
  • fractals
  • systems

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