Anomalous impurity diffusion in models of tokamak edge plasma turbulence

Using a simple spatially periodical and stationary potential as a model of electrostatic tokamak edge plasma turbulence, we have found recently [1, 2] an anomalous impurity diffusion in this regime. In this contribution, we estimate this diffusion for a more general and realistic form of the potential, which is close to the Hasegawa-Wakatani (HW) potential. As an interesting consequence of the discussed dynamics, we present possibility of radial electric field generation in the edge turbulence regime. This effect might play a role in tokamak scenarios with transport barriers.