Sheared poloidal flow driven by mode conversion in tokamak plasmas |
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Authors: | Jaeger E F Berry L A Myra J R Batchelor D B D'Azevedo E Bonoli P T Phillips C K Smithe D N D'Ippolito D A Carter M D Dumont R J Wright J C Harvey R W |
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Institution: | Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071, USA. |
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Abstract: | A two-dimensional integral full-wave model is used to calculate poloidal forces driven by mode conversion in tokamak plasmas. In the presence of a poloidal magnetic field, mode conversion near the ion-ion hybrid resonance is dominated by a transition from the fast magnetosonic wave to the slow ion cyclotron wave. The poloidal field generates strong variations in the parallel wave spectrum that cause wave damping in a narrow layer near the mode conversion surface. The resulting poloidal forces in this layer drive sheared poloidal flows comparable to those in direct launch ion Bernstein wave experiments. |
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