Computational modelling of a purely neoclassical scrape-off layer

We study the Scrape-off Layer of ASDEX Upgrade in a scenario where the neoclassical transport phenomena are dominant with respect to the anomalous contributions. To represent such a neoclassical scenario, we implemented the expressions for the energy and momentum radial transport, toroidicity effects being introduced automatically by the tokamak geometry. Correspondingly, we reduced the anomalous transport coefficients, and accounted partially for drift effects. An extremely large difference between the two divertor plates was found, especially regarding the electron energy flux and temperature profiles. (orig.)