Simultaneous measurement of turbulent transport characteristics on the high and low field side in edge tokamak plasma

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K13898
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 14020:Nuclear fusion-related
• Research Institution: Kyushu University
• Principal Investigator: MOON Chanho 九州大学, 応用力学研究所, 准教授 (50734753)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 核融合プラズマ / プラズマ診断 / 乱流揺動 / ボールペンプローブ

Outline of Final Research Achievements

In the field of magnetic confinement fusion research, understanding and controlling the thermal and particle transport mechanisms in the peripheral plasma is an urgent challenge. Recent simulation studies have revealed significant differences in the characteristics of turbulent fluctuations and transport between the high- and low-magnetic-field sides of the magnetically confined plasma. However, simultaneous measurement of turbulent fluctuations on both sides has been difficult in large tokamak devices, making detailed validation of simulations and theoretical predictions challenging. Therefore, in this study, we aimed to establish a high-time-resolution temperature and potential fluctuation measurement method for turbulent transport evaluation using the PANTA device at the initial stage, and ultimately aimed to simultaneously evaluate turbulent transport on the high- and low-magnetic-field sides of the peripheral plasma in the PLATO small tokamak device.

Free Research Field

プラズマ乱流

Academic Significance and Societal Importance of the Research Achievements

異常な乱流輸送の原因を解明し、その制御方法を確立することは、核融合発電の実現に向けて重要な一歩である。新しい計測法やプラズマの特性理解に基づく技術革新は、エネルギー技術全般に影響を与える。高い効率で安定したプラズマの閉じ込めが可能になることで、経済的な核融合発電が実現し、将来のエネルギー供給の安定化に寄与すると考えられる。