Study of small scale effectts on macroscopic plasma instability based on extended MHD models for low collisionality plasmas

2014 Fiscal Year Final Research Report

• Project/Area Number: 24740375
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: National Institute for Fusion Science
• Principal Investigator: ITO Atsushi 核融合科学研究所, ヘリカル研究部, 助教 (70413987)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 電磁流体力学 / 拡張MHD / プラズマ不安定性 / 二流体MHD / 有限ラーマー半径効果

Outline of Final Research Achievements

Theoretical studies of small scale effects on macroscopic dynamics of plasmas are carried out based on extended magnetohydrodynamic models. Two-fluid and finite ion temperature effects on the Rayleig-Taylor and Kelvin-Helmholtz instabilities in finite beta plasmas are examined and new condtions for the absence of complete stabilization of high-wavenumber modes are found. Linear eigenmode equations for tearing mode instability to analyse effects of heat flux in gyroviscosity that is a finite ion temperature effect are derived. These effects are not negligible for low collisionality plasmas. Coordinate systems to study stability of toroidal equilibrium with flow are also constructed.

Free Research Field

プラズマ物理