ASDEX Edge and Divertor Simulation and the Problem of Incomplete and Inaccurate Experimental Data

The one‐dimensional hydrodynamic code SOLID coupled with the two‐dimensional Monte Carlo neutral gas code DEGAS are used to simulate the scrape‐off layer and divertor recycling region of the ASDEX tokamak. A numerical data base is created for the relevant parameter regime and compared to the limited amount of experimental data. A reasonable fit with ohmic data is obtained, assuming classical heat flow along field lines and allowing for varying divertor saturation. The problem of experimental errors on one side and deficiencies in the theoretical model on the other side are discussed.