Modelling of the ASDEX-Upgrade scrape-off layer plasma

For future fusion experiments like ITER the plasma edge and divertor region is of crucial importance with regards to power and particle control, impurity transport and helium removal. To understand the underlying physics appropriate models have to be developed and must be validated using experiments in tokamaks like ASDEX-Upgrade. These models then can also be used to predict the behaviour of future fusion devices or to optimize their design, but also to simulate different installations in present machines, in order to optimize them before installation in the machine. In this paper we present first calculations with the B2-EIRENE code package for the design of a divertor baffle for the ASDEX-Upgrade tokamak. This baffle will be installed to enhance the neutral gas pressure in the pumping duct for increased pumping capability. (author) 3 refs., 3 figs