Hannover 2016 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 5: Poster Session- Helmholtz Graduate School for Plasma Physics
P 5.5: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
ICRF induced edge plasma convection in ASDEX Upgrade — •Wei Zhang1,2,3, Yuehe Feng1, Tilmann Lunt1, Jean-Marie Noterdaeme1,2, Jonathan Jacquot1, Laurent Colas4, David Coster1, Roberto Bilato1, Volodymyr Bobkov1, Roman Ochoukov1, and ASDEX Upgrade Team1 — 1Max Planck Institute for Plasma physics, Garching/Greifswald, Germany — 2University of Ghent, Ghent, Belgium — 3Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, P. R. China — 4CEA, IRFM, Saint-Paul-Lez-Durance, France
Ion Cyclotron Range of Frequency (ICRF) heating is one of the main auxiliary plasma heating methods in tokamaks. It relies on the fast wave to heat the plasma. However the slow wave can also be generated parasitically. The parallel electric field of the slow wave can induce large biased plasma potential through sheath rectification. The rapid variation of this rectified potential across the magnetic field can cause significant E× B convection in the Scrape-Off Layer (SOL). The ICRF induced convection can affect the SOL density, influence the ICRF power coupling and enhance the strength of plasma-wall interactions. To explore these physics, we will not only show the experimental evidences in ASDEX Upgrade, but also present the associated simulation results with the 3D edge plasma fluid code EMC3-Eirene. Further simulations via combination of EMC3-Eirene and a sheath code SSWICH in an iterative and quasi self-consistent way can give good predictions for future experiments.