Universal Probability Distribution Function for Bursty Transport in Plasma Turbulence
- National Technical University of Athens, Association Euratom-Hellenic Republic, Athens 15773 (Greece)
- France-Japan Magnetic Fusion Laboratory, LIA 336/UMR 6633 CNRS-Universite de Provence, Marseille (France)
- I.R.F.M., CEA Cadarache, St Paul-Les-Durance 13108 (France)
- National Observatory of Athens, Institute for Space Applications and Remote Sensing, Penteli 15236 (Greece)
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071 (United States)
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.
- OSTI ID:
- 21370761
- Journal Information:
- Physical Review Letters, Vol. 103, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.103.165001; (c) 2009 The American Physical Society; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CONVECTION
DISTRIBUTION FUNCTIONS
FLUCTUATIONS
MAGNETIC CONFINEMENT
PLASMA
PROBABILITY
STATISTICS
STOCHASTIC PROCESSES
TURBULENCE
CONFINEMENT
ENERGY TRANSFER
FUNCTIONS
HEAT TRANSFER
MASS TRANSFER
MATHEMATICS
PLASMA CONFINEMENT
VARIATIONS