Experimental evidence of long-range correlations and self-similarity in plasma fluctuations

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

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Abstract

To better understand long time transport dynamics, techniques to investigate long-range dependences in plasma fluctuations have been applied to data from several confinement devices including tokamaks, stellarators, and reversed field pinch. The results reveal the self-similar character of the edge plasma fluctuations. This implies that the tail of the autocorrelation function decays as a power law and suggests that there is a superdiffusive component of the anomalous transport. Rescaled fluctuation and turbulent flux spectra from different devices also show a strong similarity. For a range of parameters corresponding to the tokamak ohmic regime and equivalent power for other devices, the spectral decay index may show a universal character.
Original languageEnglish
Pages (from-to)1885 - 1892
Number of pages8
JournalPhysics of Plasmas
Volume6
Issue number5 I
DOIs
Publication statusPublished - 1999
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., ... Antoni, V. (1999). Experimental evidence of long-range correlations and self-similarity in plasma fluctuations. Physics of Plasmas, 6(5 I), 1885 - 1892. https://doi.org/10.1063/1.873490