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(TH/P3-11) Rotation Dynamics and Stability of Collisional Edge Layers in Tokamak Plasma

U. Daybelge1), C. Yarim1), A. Nicolai2)
1)Istanbul Technical University, Fac. of Aeronautics & Astronautics, Maslak, Istanbul, Turkey
2)Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, Euratom Association, Trilateral Euregio Cluster, Jülich, Germany

Abstract.  The revisited transport theory for collisional edge layer with steep radial gradients in the toroidal damping time scale is extended to include also the faster poloidal damping time scale. A two-time-scale analysis is applied in order to determine the stability behaviour of both poloidal and toroidal rotations of plasma. It is observed, that the rotational spin-up tendencies are strongly controlled by charge exchange interactions, neutral beam injection, or a radial current.

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IAEA 2003