Exploring phase space turbulence in magnetic fusion plasmas

25th IUPAP Conference on Computational Physics

物理学;计算机科学

Watanabe, T.-H.^1 ; Idomura, Y.^2 ; Maeyama, S.^3 ; Nakata, M.^3 ; Sugama, H.^1 ; Nunami, M.^1 ; Ishizawa, A.^1

National Institute for Fusion Science, Toki, Gifu 509-5292, Japan^1

Japan Atomic Energy Agency, Chiba 277-8587, Kashiwa, Japan^2

Japan Atomic Energy Agency, Rokkaho, 039-3212, Aomori, Japan^3

关键词: Configuration space;    Drift-wave turbulences;    Gyrokinetic simulations;    High performance computing;    Magnetic fusion plasmas;    Multi-scale turbulence;    Transport reduction;    Turbulent transports;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/510/1/012045/pdf
DOI  :  10.1088/1742-6596/510/1/012045

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Plasma turbulence accompanied with fluctuations of the distribution function and the electromagnetic fields develops on the phase space composed of the configuration space and the velocity space. Detailed structures of the distribution function in magnetic fusion plasmas are investigated by means of gyrokinetic simulations performed on massively parallel supercomputers. The gyrokinetic simulations of drift wave turbulence have demonstrated entropy transfer in the phase space, zonal flow enhancement by helical fields and the resultant transport reduction. The state-of-the-art high performance computing is utilized for a multi-scale turbulence simulation covering ion- and electron-scales and for a global-scale simulation of turbulent transport in a sub-ITER sized plasma.