3-D Ray-tracing and 2-D Fokker-Planck simulations of radiofrequency application to tokamak plasmas

Journal Article · Mon Sep 20 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59681· OSTI ID:20216699

Paoletti, F ^[1]; Cardinali, A ^[2]; Bernabei, S ^[3]

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1. Columbia University, New York, New York (United States)
2. Associazione Euratom-ENEA sulla Fusione, Frascati, Rome, (Italy)
3. 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, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 485; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOLTZMANN EQUATION
ELECTRON DENSITY
HIGH-FREQUENCY HEATING
PLASMA SIMULATION
THEORETICAL DATA
TOKAMAK TYPE REACTORS
WKB APPROXIMATION