3-D Ray-tracing and 2=DFokker-P1anck Simulations of Radiofrequency Application to Tokamak Plasmas
نویسنده
چکیده
A state of the art numerical tool has been developed to simulate the QsTj propagation and the absorption of coexisting diffemt types of waves in a tokamak geometxy. The code includes a numerical solution of the three-dimensional (R, Z, 0) toroidal wave equation for the electric field of the different waves in the WKBJ approximation. At each step of integration, the two-dimensional (VI!, v~ Fokker-Planck equation is solved in the presence of quasilinear diffhsion coefficients. The electron Landau damping of the waves is modeled taking into account the interaction of the wave electric fiekls with the quasilinearly modified distribution fimction. Consistently, the code calculates the radial profiles of non-inductively generated current densities, the transmitted power traces and the total power damping curves. Synergistic effkts among the diffenimttype of waves (e.g., lower hybrid and ion Bernstein waves) are studied through the separation of the contributions of the single wave from the effxts due to their coexistence.
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