Blobby cross-field plasma transport in tokamak edge

Recent studies suggest rather fast radial plasma transport in tokamak scrape off layer (SOL). Moreover, it seems that this transport has not diffusive but convective-like features. One of the plausible mechanisms of this fast convective SOL plasma transport can be associated with plasma blobs. Such blobs have been observed in many experiments. Here we present the results of our investigations of different aspects of blobby non-diffusive transport in the SOL ranging from the simplified analytic theory of individual blob propagation, to the 2D and 3D modeling of blobs with turbulence codes, and, finally, the macroscopic modeling of edge plasma transport in DIII-D tokamak. (author)