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P: Plasmaphysik

P 19: Magnetischer Einschluß 2

P 19.3: Talk

Monday, March 7, 2005, 15:15–15:30, HU 3038

Electrostatic Drift Turbulence in TEXTOR-DED — •T. Haberscheidt ¹, D. Reiser¹, and P. Beyer² — ¹Institut für Plasmaphysik, FZ Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany — ²Equipe Dynamique des Systemes Complexes Laboratoire PIIM, CNRS - Universite de Provence, 13397 Marseille cedex 20, France

Small scale fluid drift turbulence in the plasma edge is known to be of importance for the confinement properties of fusion devices due to its impact on the anomalous transport. A nonlinear, electrostatic 2-Field-Model for resistive ballooning modes (RBM) in drift approximation is used for the 3D tokamak configuration of TEXTOR-DED. The RBM3D code has been used in a number of simulations performed for a range of plasma parameters where resistive balloning is expected to dominate the character of turbulence. The switch on of a magnetic field perturbation, which is generated at TEXTOR by external DED coils, introduces a stochastic magnetic field in the plasma. By means of numerical simulations the influence of this perturbation on turbulent transport and experimental observable quantities like e.g. fluctuation levels, poloidal rotation, etc., is studied for different plasma parameter ranges and for computational domains with different radial extension.