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OT06 · Simulation Study of Energetic Ion Distribution during Combined NBI and ICRF Heating in LHD

S. Murakami¹, A. Fukuyama¹, V. Kasilov², T. Mutoh³, R. Kumazawa³, T. Seki³, K. Saito³, T. Watari³, M. Isobe³, M. Nishiura³, T. Ozaki³, M. Osakabe³, M. Sasao⁴, and LHD Experimental Group

¹Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
²Institute of Plasma Physics, National Science Center, KIPT, Kharkov, Ukraine
³National Institute for Fusion Science, Oroshi, Toki, Gifu 509-5292, Japan
⁴Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan

Abstract: In the LHD, significant performances of ICRF heating (fundamental, minority heating regime) have been demonstrated[1-4] and up to 500keV of energetic tail ions have been observed by fast neutral particle analysis (NPA)[5-7]. These measured results indicate a good property of energetic ion confinement in helical systems. From the 9th campaign of LHD experiment (FY2005) a new perpendicular NBI heating system (P<3MW) has been installed and an effective heating of perpendicularly injected beam ions by the higher harmonics ICRF heating is expected.

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