2020 Fiscal Year Final Research Report

Investigation of energy transport in detached divertor plasma associated with neutral particle / radiation transport

Research Project

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Project/Area Number	16H02440
Research Category	Grant-in-Aid for Scientific Research (A)
Allocation Type	Single-year Grants
Section	一般
Research Field	Nuclear fusion studies
Research Institution	Nagoya University
Principal Investigator	OHNO NORIYASU 名古屋大学, 工学研究科, 教授 (60203890)
Co-Investigator(Kenkyū-buntansha)	梶田信名古屋大学, 未来材料・システム研究所, 准教授 (00455297) 澤田圭司信州大学, 学術研究院工学系, 教授 (40262688) 荒巻光利日本大学, 生産工学部, 教授 (50335072) 田中宏彦名古屋大学, 工学研究科, 助教 (60609981) 河村学思核融合科学研究所, ヘリカル研究部, 助教 (70509520)
Project Period (FY)	2016-04-01 – 2020-03-31
Keywords	核融合 / 周辺プラズマ / ダイバータプラズマ / 非接触プラズマ / エネルギー輸送 / シミュレーション / 原子・分子過程
Outline of Final Research Achievements	A steady-state detached plasma (DP) was generated using a linear divertor plasma simulator, and the energy transport in the DP was clarified using the developed measuring devices. Neutral particle temperature measurement by laser absorption spectroscopy showed that the neutral particle temperature strongly affects the formation of DP. Distortion of the electron temperature distribution function due to fluctuations in the DP was observed by high-time resolution laser Thomson scattering measurement. Furthermore, the plasma distribution near the recombination front of the DP using two-dimensional movable probe measurement was clarified. As a result, it was revealed that the radial distribution of plasma was flattened by the enhanced plasma transport across the magnetic field line caused by the plasma fluctuation.
Free Research Field	核融合学
Academic Significance and Societal Importance of the Research Achievements	高熱流ダイバータプラズマ模擬試験装置を駆使し，原型炉で遭遇する非接触ダイバータプラズマに関する諸課題に関する系統的な研究を遂行し，原型炉設計に資する学術的な基盤を創成する点。本研究成果により非接触ダイバータ性能を予測可能なシミュレーションコードが実現され，信頼性が高い原型炉ダイバータ設計に大きく資することが可能である．