2008•Plasma and Fusion ResearchOpen access

Simulation Study of ICRF Wave Propagation and Absorption in 3-D Magnetic Configurations

T. Yamamoto, S. Murakami, A. Fukuyama

Abstract

Ion cyclotron range of frequency (ICRF) wave propagation and absorption are investigated using TASK/WM, in which Maxwell's equation for an RF wave electric field with a complex frequency is solved as a boundary value problem. The wave propagation is solved in the tokamak (JT-60U) and helical (LHD) configurations in the minority ion heating regime. Magnetic flux coordinates based on the MHD equilibrium in LHD were obtained using the VMEC code. A new model for the radial extension of the magnetic coordinates is applied to improve the numerical error near the plasma-vacuum boundary. The ICRF wave propagation and absorption are clearly seen at the ion cyclotron resonance layer and two-ion-hybrid layers with a high spatial resolution.

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Key concepts: Physics, Tokamak, Lower hybrid oscillation, Computational physics, Ion, Cyclotron, Plasma, Absorption (acoustics)