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The impact of lithium impurities on the microstability and turbulenttransport characteristics in the core of a typical FTU Liquid Lithium Limiter(LLL)(Mazzitelli et al., Nucl. Fusion, 2011) discharge during the densityramp-up phase is studied. A non-linear gyrokinetic analysis performed with GKW(Peeters et al.,Comp. Phys. Comm., 2009) accompanied by a quasi-linear fluidanalysis is presented. We show that a centrally peaked, high concentrationlithium profile contributes to the electron peaking by reducing the outwardelectron flux, and that it leads to inward turbulent deuterium transportthrough ion flux separation.

Analysis of Lithium Driven Electron Density Peaking in FTU Liquid Lithium Limiter Experiments