Abstract
The electrostatic quasi-linear particle and thermal diffusivities, due to the toroidal ion temperature gradient (ITG) driven modes and the dissipative trapped electron (DTE) mode, are considered in the dissipative limit, ω << vef/ϵ. Impurities are included by assuming a plasma with three particle species (electrons, main ions and impurity ions). The diffusivities are studied by computing interpretative radial transport profiles based on a TEXTOR background variation, using a saturation level approximation. The transport is found to be driven also by impurity modes, in particular when a light impurity species, such as helium, is assumed. The existence of inward fluxes of particles and heat is discussed
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