Neutron Emission Profile Measurement and Fast Charge Exchange Neutral Particle Flux Measurement for Transport Analysis of Energetic Ions in JT-60U
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概要
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This paper describes diagnostics for transport analysis of energetic ions in JT-60U. Line integrated neutron emission profiles are measured using Stilbene neutron detectors, which are installed as a neutron emission profile monitor. The flux and energy distribution of charge exchange neutral particles are measured using a natural diamond detector (NDD). These measurements in the presence of bursting instabilities in the frequency range of Alfvén Eigenmode induced by negative-ion-based neutral beam injection, which are called Abrupt Large-amplitude Events, indicate that energetic ions are transported from the core region in the plasma due to a resonance interaction between energetic ions and the instabilities. Development of a digital signal processing (DSP) system for a neutron detector and a NDD enabling a sampling rate in the MHz class is proceeding. The DSP system for the neutron detector successfully discriminates between neutrons and gamma-rays in tests using neutron/gamma-ray sources.
著者
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ISOBE Mitsutaka
National Insitute for Fusion Science
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NISHITANI Takeo
Japan Atomic Energy Agency
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Kusama Yoshinori
Japan Atomic Energy Res. Inst. Ibaraki Jpn
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ISHIKAWA Masao
Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0193, Japan
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KRASILNIKOV Anatoli
Troitsk Institute for Innovating and Fusion Research TRINITI
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Sasao Mamiko
Department Of Physics Osaka University:institute Of Plasma Physics Nagoya Univ
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Baba Mamoru
Department Of Electrical And Electronic Engineering Iwate University
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SUKEGAWA Atsuhiko
Japan Atomic Energy Agency
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SHINOHARA Koji
Japan Atomic Energy Agency, Naka 311-0193, Japan
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BABA Mamoru
Department of Engineering, Tohoku University
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TAKECHI Manabu
Japan Atomic Energy Agency
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KASHUCK Yuri
Troitsk Institute of Innovating and Fusion Research
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ITOGA Toshio
Department of Engineering, Tohoku University
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ISHIKAWA Masao
Japan Atomic Energy Agency
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KUSAMA Yoshinori
Japan Atomic Energy Agency
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SHINOHARA Koji
Japan Atomic Energy Agency
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KRASILNIKOV Anatoli
Troitsk Institute of Innovating and Fusion Research
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SASAO Mamiko
Department of Engineering, Tohoku University
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