Labit, B.Furno, I.Fasoli, A.Diallo, A.Mueller, S. H.Plyushchev, G.Podesta, M.Poli, F. M.2008-04-162008-04-162008-04-16200710.1103/PhysRevLett.98.255002https://infoscience.epfl.ch/handle/20.500.14299/22404WOS:000247469400030A unique parabolic relation is observed to link skewness and kurtosis of around ten thousand density fluctuation signals, measured over the whole cross section of a toroidal magnetized plasma for a broad range of experimental conditions. All the probability density functions of the measured signals, including those characterized by a negative skewness, are universally described by a special case of the Beta distribution. Fluctuations in the drift-interchange frequency range are necessary and sufficient to assure that probability density functions can be described by this specific Beta distribution.LRP 833text::journal::journal article::research article