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(THP1/21) Stability of Neoclassical Rotation in Edge Plasmas

U. Daybelge¹⁾, C. Yarim¹⁾, H. A. Claassen²⁾, A. L. Rogister^2)
 
1) Istanbul Technical University, Faculty of Aeronautics and Astronautics, 80626 Maslak, Istanbul/TURKEY
²⁾ IPP-T, Forschungszentrum Jülich, GmbH, Association EUROATOM-FZJ, Trilateral Euregio Cluster, D-52425, Jülich/GERMANY

Abstract.  Using a revised neoclassical theory, the stability of rotation velocities of a collisional tokamak plasma near the separatrix is investigated. First, assuming equilibrium, full coupled equations of poloidal and toroidal velocities are solved by numerical means and depending on the underlying temperature and density profiles behavior of solutions, such as shocks etc. is studied. Secondly, using a generic quasilinear differential equation for the toroidal velocity, we investigate its evolution from an initial profile depending on the coefficients of the equation and give a criterion for the development of a breaking, or a shock front represented by it.

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