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Continuous Time Random Walk (view source)
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== Motivation == | == Motivation == | ||
Interestingly, the absence of local characteristic scales means that ''effective'' transport coefficients (the diffusivity etc.) become dependent on the system size, as is indeed suggested by experimental scaling laws for plasma confinement. | Interestingly, the absence of local characteristic scales means that ''effective'' transport coefficients (the diffusivity etc.) become dependent on the system size, as is indeed suggested by experimental [[Scaling law|scaling laws]] for plasma confinement. | ||
In the framework of transport in plasmas, it is believed that the presence of ''trapping regions'' (such as turbulent eddies, magnetic islands, internal transport barriers) may lead to [[Non-diffusive transport|sub-diffusion]], whereas the occurrence of ''streamers'' and profile self-regulation (via [[TJ-II:Turbulence|turbulence]]) may lead to [[Non-diffusive transport|super-diffusion]]. | In the framework of transport in plasmas, it is believed that the presence of ''trapping regions'' (such as turbulent eddies, magnetic islands, internal transport barriers) may lead to [[Non-diffusive transport|sub-diffusion]], whereas the occurrence of ''streamers'' and profile self-regulation (via [[TJ-II:Turbulence|turbulence]]) may lead to [[Non-diffusive transport|super-diffusion]]. | ||