Study on the heat transport in magnetically confined plasmas by simultaneous measurement of micro-scale turbulence and macro-scale fluctuation

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06653
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Ido Takeshi 核融合科学研究所, ヘリカル研究部, 准教授 (50332185)
• Co-Investigator(Kenkyū-buntansha): 清水 昭博 核融合科学研究所, ヘリカル研究部, 助教 (00390633) ; 谷池 晃 神戸大学, 海事科学研究科, 准教授 (50283916)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 磁場閉じ込めプラズマ / 乱流 / 高速イオン励起不安定性 / 重イオンビームプローブ / HIBP / 重イオン検出器 / GAM

Outline of Final Research Achievements

In order to investigate the mechanism of the particle and heat transport in magnetically confined plasmas by measuring micro-scale turbulence and macro-scale fluctuations which may affect the turbulence, we have developed a position sensitive detector with high detection efficiency for the heavy ion beam probe on the Large Helical Device. It was confirmed that the developed detector could measure the beam position, sufficiently. However, the improvement in the detection efficiency was only 20 %, compared with the previous detector. Although the plasma experiment was performed under low density plasmas, the modulation of micro-scale turbulence by the macro-scale energetic-particle-driven GAM (EGAM) was observed. In addition, the spatial asymmetry and abrupt excitation of the GAM, which may affect the ion heat transport, were also found.

Free Research Field

核融合学