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(THP2/26) Global Analysis of ICRF Waves and Alfvén Eigenmodes in Toroidal Helical Plasmas

A. Fukuyama¹⁾, E. Yokota¹⁾, T. Akutsu^1)
 
1) Kyoto University, Kyoto, Japan

Abstract.  The full wave code TASK/WM was extended to analyze the waves in a plasma with three-dimensional inhomogeneity and was applied to the analysis of propagation and absorption of the ICRF waves in the large helical device (LHD). We have studied various parameter dependence of radial power deposition profile and antenna loading impedance; frequency, minority ion density ratio, toroidal mode number. The dependence on the minority ion ratio agrees well with the experimental observation on LHD. The code also has a capability to describe the three kinds of weakly damped Alfvén eigenmodes, GAE, TAE and HAE, in toroidal helical plasmas. We found several kinds of eigenmodes and studied their behavior.

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