JT-60Uにおけるシンチレーションファイバを使用したトリトン燃焼率測定

概要

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We have developed a new compact neutron detector with an array of scintillating fibers for the triton burn up measurement. This detector suppresses the intense gamma background and has an inherent directionality to the DT neutrons which was tested with the DT neutron generator FNS in JAERI Tokai. Two prototype detectors have been installed on JT-60U to perform the highly time-resolved measurements on each sight line successfully. In order to investigate the confinement of 1 MeV tritons, the calibrated DT neutron emission was compared with the classical slowing down calculation for a high T_i H-mode plasma. They agreed well but there was a slight difference which was tried to be explained by the DT neutron emission profile and the radial dependence of the fast triton confinement.
社団法人プラズマ・核融合学会の論文
1996-07-25