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Author(s):
M. Rajkovic and M. Skoric
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Title:
Multifractal Characterization of L- and H-mode Plasma Edge Turbulence
Date of publication:
June 2006
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Key words:
plasma, turbulence, intermittency, tokamak, multifractal, long - range dependence, wavelets
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Abstract:
Measurements of the edge plasma turbulence obtained by reciprocating Langmuir probe are analyzed and tested for self-similarity, long-range dependence and multifractality. We present evidence for the multifractal character existing in both L- and H- mode data and also provide strong support for the local self - similarity in the case of L-mode. However, we show that neither L-mode nor H-mode measurements show self-similarity in the global sense. Moreover, we use several fractal and multifractal measures in addition to some non-standard statistical techniques in order to characterize the L and H-mode fluctuations.
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