Recurrence quantification analysis of electrostatic fluctuations in fusion plasmas

Z. O. Guimaraes-Filho, I. L. Caldasa, R. L. Viana, J. Kurths, I. C. Nascimento, Yu. K. Kuznetsov

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Abstract

We have investigated plasma turbulence at the edge of a tokamak plasma using data from electrostatic potential fluctuations measured in the Brazilian tokamak TCABR. Recurrence quantification analysis has been used to provide diagnostics of the deterministic content of the series. We have focused our analysis on the radial dependence of potential fluctuations and their characterization by recurrence-based diagnostics. Our main result is that the deterministic content of the experimental signals is most pronounced at the external part of the plasma column just before the plasma radius. Since the chaoticity of the signals follows the same trend, we have concluded that the electrostatic plasma turbulence at the tokamak plasma edge can be partially explained by means of a deterministic nonlinear system. (C) 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1088-1095
Number of pages8
JournalPhysics Letters A
Volume372
Issue number7
Early online date11 Sep 2007
DOIs
Publication statusPublished - 11 Feb 2008

Keywords

  • time-series
  • TCABR TOKAMAK
  • drift waves
  • plots
  • turbulence
  • transport
  • systems

Cite this

Guimaraes-Filho, Z. O., Caldasa, I. L., Viana, R. L., Kurths, J., Nascimento, I. C., & Kuznetsov, Y. K. (2008). Recurrence quantification analysis of electrostatic fluctuations in fusion plasmas. Physics Letters A, 372(7), 1088-1095. https://doi.org/10.1016/j.physleta.2007.07.088