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(THP2/05) Test of the Predictive Capability Of B2-Eirene on ASDEX-Upgrade

R. Schneider, D. P. Coster, A. Kallenbach, K. Borrass, H.-S. Bosch, J. C. Fuchs, J. Gafert, A. Herrmann, V. Mertens, J. Neuhauser, J. Schweinzer, U. Wenzel, B. Braams¹, D. Reiter², and the ASDEX Upgrade Team

Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching
¹ Courant Institute, New York University, New York, NY 10012
² IPP, Forschungszentrum Jülich GmbH, EURATOM Association, D-52425 Jülich

Abstract.  Based on validated B2-Eirene results for the previous divertor of ASDEX Upgrade, the modelling predictions for the new divertor are compared with the actual experimental results. For the same experimental scenarios (L-mode) in both divertors the predictions are robust and in agreement with experimental results. For a full quantative agreement in H-mode both the carbon chemical sputtering yield and the radial transport had to be adjusted. The new divertor has a reduced power load due to larger radiation losses. These are caused by larger hydrogen losses, enhancement of carbon radiation due to radial transport and convective energy transport into the radiation zone, and larger radial energy transport in the divertor.

Read the full paper in PDF format.