3-D Ray-tracing and 2-D Fokker-Planck simulations of radiofrequency application to tokamak plasmas
- Columbia University, New York, New York (United States)
- Associazione Euratom-ENEA sulla Fusione, Frascati, Rome, (Italy)
- Plasma Physics Laboratory, Princeton, New Jersey (United States)
A state of the art numerical tool has been developed to simulate the propagation and the absorption of coexisting different types of waves in a tokamak geometry. The code includes a numerical solution of the three-dimensional (R, Z, {phi}) toroidal wave equation for the electric field of the different waves in the WKBJ approximation. At each step of integration, the two-dimensional (v{sub (parallel} {sub sign)}, v{sub (perpendicular} {sub sign)}) Fokker-Planck equation is solved in the presence of quasilinear diffusion coefficients. The electron Landau damping of the waves is modeled taking into account the interaction of the wave electric fields with the quasilinearly modified distribution function. Consistently, the code calculates the radial profiles of non-inductively generated current densities, the transmitted power traces and the total power damping curves. Synergistic effects among the different type of waves (e.g., lower hybrid and ion Bernstein waves) are studied through the separation of the contributions of the single wave from the effects due to their coexistence. (c) 1999 American Institute of Physics.
- OSTI ID:
- 20216699
- Journal Information:
- AIP Conference Proceedings, Vol. 485, Issue 1; Other Information: PBD: 20 Sep 1999; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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