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Fast-Particle Diagnostics on LHD

M. Isobe, M. Osakabe, T. Ozaki, M. Nishiura, P. V. Goncharov, E. Veshchev, K. Ogawa, K. Nagaoka, K. Saito, S. Murakami, T. Saida, M. Sasao, K. Toi, LHD Experiment Group

Fusion Science and Technology / Volume 58 / Number 1 / July/August 2010 / Pages 426-435

Chapter 8. Diagnostics / Special Issue on Large Helical Device (LHD) /

To aid understanding of physics related to fast ions in the Large Helical Device (LHD) with a three-dimensional shape, a comprehensive set of fast-particle diagnostics has been developed. Fast ions (H+) have been created by neutral beam injection and ion cyclotron resonance heating in LHD discharges. Intense fast-ion populations not only heat the bulk plasma but also drive collective instabilities under certain experimental conditions. Fast-ion experiments on LHD have been conducted to investigate neoclassical confinement of fast ions and issues on anomalous transport of fast ions induced by fast-ion-driven instabilities. This paper reviews fast-particle diagnostics that are essential for study of fast-ion physics on LHD.

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