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P: Fachverband Plasmaphysik
P 10: Poster Session 2
P 10.2: Poster
Dienstag, 10. März 2020, 16:30–18:30, Empore Lichthof
Physics applications of the ASDEX Upgrade flight simulator Fenix — •Michael Englberger1,2, Filip Janky2, Emiliano Fable2, Ralph Dux2, Ondrej Kudlacek2, Thomas Pütterich2, Hartmut Zohm2, and the ASDEX Upgrade Team2 — 1Fakultät für Physik, Ludwig-Maximilians-Universität München, Schellingstraße 4, D-80799 München — 2Max-Planck-Institut für Plasmaphysik, D-85748 Garching b. München, Germany
Fenix, the ASDEX Upgrade (AUG) flight simulator, is a tool based on the ASTRA transport code, coupled with the 2-D equilibrium code SPIDER and a Simulink model of the actuators and the AUG control system. In this work Fenix was used to simulate existing AUG discharges in order to study and improve the models of Fenix. We focused on plasma discharges in which the loss of heating sources led to a disruption of the plasma. The relevant plasma and control system parameters already showed a realistic behavior, while some deviations require further analysis. Another aim of this work was to find a description of the tungsten influx into the vessel. Tungsten is the dominant radiation source in AUG, therefore, it is essential to include a tungsten influx model. An estimate of the tungsten influx was calculated from measurements for a set of typical H-mode plasma discharges. Using experimental data, a scaling for tungsten influx as a function of plasma parameters (e.g. electron temperature and density) was found. The implementation of the tungsten influx improved the behavior of the simulated plasma radiation, however, some remaining discrepancies showed the tungsten transport needs further improvement.