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This study presents the investigation of the connection between radialelectric field, gradient of Reynolds stress and Long Range Correlation (LRC),as a proxy for Zonal Flows (ZF), in different plasma scenarios in the TJ-IIstellarator. Monte Carlo simulations were made showing that radial electricfields in the range of those experimentally measured have an effect on theneoclassical orbit losses. The results indicate that, despite the order ofmagnitude of turbulent acceleration is comparable to the neoclassical dampingof perpendicular flows, its dependence with radial electric field is notcorrelated with the evolution of LRC amplitude, indicating that turbulentacceleration alone cannot explain the dynamics of Zonal Flows. These resultsare in line with the expectation that the interplay between turbulent andneoclassical mechanisms is a crucial ingredient of the dynamics of edge ZonalFlows.

On the interplay between turbulent forces and neoclassical particle losses in Zonal Flow dynamics