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Bursty transport phenomena associated with convective motion present universal statistical characteristics among different physical systems. In this Letter, a stochastic univariate model and the associated probability distribution function for the description of bursty transport in plasma turbulence is presented. The proposed stochastic process recovers the universal distribution of density fluctuations observed in plasma edge of several magnetic confinement devices and the remarkable scaling between their skewness S and kurtosis K. Similar statistical characteristics of variabilities have been also observed in other physical systems that are characterized by convection such as the x-ray fluctuations emitted by the Cygnus X-1 accretion disc plasmas and the sea surface temperature fluctuations.

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Authors: SANDBERG I, National Technical University of Athens, Association Euratom - Hellenic Republic, Athens (EL);HIZANIDIS K, National Technical University of Athens, Association Euratom - Hellenic Republic, Athens (EL);ROPOKIS G, National Observatory of Athens, Institute for Space Applications and Remote Sensing, Penteli (EL);BENKADDA S, France-Japan Magnetic Fusion Laboratory, Marseille (FR);GARBET X, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);DEL-CASTILLO-NEGRETE D, Oak Ridge National Laboratory, Oak Ridge, Tennessee (US)
Bibliographic Reference: An article published in: Physical Review Letters, Issue 103, October 2009
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Record Number: 201010062 / Last updated on: 2010-01-18
Original language: en
Available languages: en