Impact of E × B flow shear stabilization on particle confinement and density peaking at JET

The impact of the E × B flow shear stabilization on particle transport and density peaking at JET is analyzed in the framework of integrated modelling with the CRONOS code. For that purpose, plasmas from a power scan which show a significant increasing of density peaking with the injected neutral beam injection power have been used as a modeling basis. By means of simulations with the quasilinear model GLF23 for the heat and particle transport, a strong link between the particle confinement and E × B flow shear stabilization is found. This is particularly important close to the pedestal region where the particle pinch direction becomes strongly inward for high E × B flow shear values. Such impact introduces some non-negligible deviation from the well-known collisonality dependence of the density peaking, whose general trend has been also obtained in the framework of this modelling by performing pedestal density scans.