Self-similarity of the plasma edge fluctuations

B.A. Carreras, B.Ph. Van Milligen, M.A. Pedrosa, R. Balbín, C. Hidalgo, D.E. Newman, E. Sánchez, M. Frances, I. García-Cortés, J. Bleuel, M. Endler, C. Ricardi, S. Davies, G.F. Matthews, E. Martines, V. Antoni, A. Latten, T. Klinger

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Abstract

The rescaled range analysis techniques are used to investigate long-range dependence in plasma edge fluctuations [Mandelbrot and Wallis, Water Resources Res. 4, 909 (1969)]. This technology has been applied to data from several confinement devices such as tokamaks, stellarators, and reversed-field pinch. The results reveal the self-similar character of the electrostatic fluctuations at the plasma edge with self-similarity parameters ranging from 0.62 to 0.72. These results show that the tail of the autocorrelation function decays as a power law for time lags longer than the decorrelation time and as long as times of the order of the confinement time. In cold plasma devices (Te< eV at the core), there is no evidence of algebraic tails in the autocorrelation function. Some other characteristic features of the autocorrelation function and power spectrum have been investigated. All of these features are consistent with plasma transport as characterized by self-organized criticality. © 1998 American Institute of Physics.
Original languageEnglish
Pages (from-to)3632 - 3643
Number of pages12
JournalPhysics of Plasmas
Volume5
Issue number10
DOIs
Publication statusPublished - 1998
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Carreras, B. A., Van Milligen, B. P., Pedrosa, M. A., Balbín, R., Hidalgo, C., Newman, D. E., ... Klinger, T. (1998). Self-similarity of the plasma edge fluctuations. Physics of Plasmas, 5(10), 3632 - 3643. https://doi.org/10.1063/1.873081