(EX/1-5) Compatibility of ITER Scenarios with Full Tungsten Wall in ASDEX Upgrade

O. Gruber1), A.C.C. Sips, R. Dux, T. Eich, J.C. Fuchs, A. Herrmann, A. Kallenbach, C.F. Maggi, R. Neu, A.J. Schweinzer, J. Stober, ASDEX Upgrade Team
1) Max-Planck-Institut für Plasmaphysik, EURATOM-Association, Garching, Germany

Abstract.  In the last two years, ASDEX Upgrade has studied the compatibility of standard H-modes and advanced scenarios with a reactor relevant, tungsten first wall. Presented are results for ITER relevant scenarios: (1) The current ramp-up phase of the discharge, (2) ELMy H-modes at low q95∼3 and (3) improved H-modes scenarios that are candidates for hybrid operation in ITER. Documented are the confinement properties of the plasma, the MHD stability and the stability against impurity accumulation. This is done for a range of plasma densities ( < ne > /nGW = 0.4 - 0.9) by using different plasma fueling techniques (including pellet injection) and by optimising the three different heating schemes available at ASDEX Upgrade (neutral beam heating, ECRH and ICRH). Specific studies are performed in a tungsten machine without boronisation, and contrasted to results directly after boronisation.

Full paper and slides available (PDF)