Tokamak turbulence at the scrape-off layer in TCABR with an ergodic magnetic limiter

M. V.A.P. Heller, I. L. Caldas, A. A. Ferreira, E. A.O. Saettone, A. Vannucci

Research output: Contribution to journalArticle (Contribution to Journal)

7 Scopus citations

Abstract

The influence of an ergodic magnetic limiter (EML) on plasma turbulence is investigated in the Tokamak Chauffage Alfvén Brésilien (TCABR), a tokamak with a peculiar natural superposition of the electrostatic and magnetic fluctuation power spectra. Experimental results show that the EML perturbation can reduce both the magnetic oscillation and the electrostatic plasma turbulence. Whenever this occurs, the turbulence-driven particle transport is also reduced. Moreover, a bis-pectral analysis shows that the nonlinear coupling between low- and high-frequency electrostatic fluctuations increases significantly with the EML application.
Original languageAmerican English
Pages (from-to)295-306
Number of pages12
JournalJournal of Plasma Physics
DOIs
StatePublished - 1 Jun 2007
Externally publishedYes

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