Abstract
The probability density functions (PDFs) of the increments of fluctuating particle fluxes are investigated. It is found that the PDFs have heavy power-law tails decreasing as x −α − 1 at x → ∞. This makes it possible to describe these PDFs in terms of fractionally stable distributions (FSDs) q(x; α, β, θ, λ). The parameters α, β, γ, and λ were estimated statistically using as an example the time samples of fluctuating particle fluxes measured in the edge plasma of the L-2M stellarator. Two series of fluctuating fluxes measured before and after boronization of the vacuum chamber were processed. It is shown that the increments of fluctuating fluxes are well described by DSDs. The effect of boronization on the parameters of FSDs is analyzed. An algorithm for statistically estimating the FSD parameters and a procedure for processing experimental data are described.
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Original Russian Text © V.V. Saenko, 2009, published in Fizika Plazmy, 2009, Vol. 35, No. 1, pp. 3–17.
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Saenko, V.V. New approach to statistical description of fluctuating particle fluxes. Plasma Phys. Rep. 35, 1–13 (2009). https://doi.org/10.1134/S1063780X09010012
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DOI: https://doi.org/10.1134/S1063780X09010012