Verification of Suppression Effect of Zonal Flow on Electron Temperature Gradient Mode in Magnetized Plasma

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K23426
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
• Research Institution: Kyushu University
• Principal Investigator: MOON Chanho 九州大学, 応用力学研究所, 助教 (50734753)
• Project Period (FY): 2019-08-30 – 2022-03-31
• Keywords: 高周波揺動 / ETGモード / PANTA

Outline of Final Research Achievements

This study aims to identify high-frequency fluctuation ETG (Electron Temperature Gradient) mode and to evaluate their nonlinear characteristics using a linear magnetized device PANTA. In order to directly measure the high-frequency ETG modes, a new electrostatic probe has been fabricated, which enables plasma fluctuation measurements up to higher frequencies (< 2 MHz) than those with conventional electrostatic probes. On the other hand, in the case of helium helicon plasma, the low-frequency density fluctuation of ~5.5 kHz and the high-frequency density fluctuation of ~200 kHz was observed at the same time under low magnetic field conditions.

Free Research Field

プラズマ物理

Academic Significance and Societal Importance of the Research Achievements

直線装置PANTAにおける乱流揺動研究に関して, 高周波揺動まで観測できる計測方法の確立は, 多スケール揺動との非線形相互作用の研究などに貢献できると期待される. また, ヘリウムヘリコンプラズマにおける乱流揺動の磁場依存性の実験結果は, 学術的に価値があると考えられる.