A new, frequency modulation mechanism for zonal flow pattern formation is presented. The model predicts the probability distribution function of the flow strength as well as the evolution of the characteristic spatial scale. Magnetic toroidicity-induced global phase dynamics is shown to determine the spatial structure of the flow. A key result is the observation that global phase patterning can lead to zonal flow formation in the absence of turbulence inhomogeneity.
On nonlinear saturation of toroidal Alfvén eigenmode due to thermal plasma nonlinearities
Max Planck Institute for Plasma Physics(马克斯·普朗克等离子体物理研究所);Center for Nonlinear Plasma Science and C.R. ENEA Frascati(非线性等离子体科学中心及恩瑞亚弗拉斯卡蒂研究中心);Institute for Fusion Theory and Simulation, School of Physics, Zhejiang University(浙江大学物理学院聚变理论与模拟研究所);Key Laboratory of Frontier Physics in Controlled Nuclear Fusion and Institute of Plasma Physics, Chinese Academy of Sciences(中国科学院等离子体物理研究所及受控核聚变前沿物理重点实验室);De Vinci Higher Education, De Vinci Research Center(德文奇高等教育机构及德文奇研究中心)
Saturation of magnetised plasma turbulence by propagating zonal flows
Princeton University(普林斯顿大学);Princeton Plasma Physics Laboratory(普林斯顿等离子体物理实验室);Rudolf Peierls Centre for Theoretical Physics, University of Oxford(牛津大学鲁道夫·派尔斯理论物理中心);University of Maryland, College Park(马里兰大学帕克分校)
Isotope Effects on TEM-driven Turbulence and Zonal Flows in Helical and Tokamak Plasmas
National Institute for Fusion Science, National Institutes of Natural Sciences(国立研究開発法人 国立統合物理学研究所 核融合科学研究所);The Graduate University for Advanced Studies(総合研究大学院大学);Faculty of Arts and Sciences, Komazawa University(駒澤大学 文学部・理学部);Nagoya University(名古屋大学)
Nonlinear entropy transfer via zonal flows in gyrokinetic plasma turbulence
The Graduate University for Advanced Studies(高级研究大学院大学);Faculty of Arts and Sciences, Komazawa University(驹泽大学文理学部);National Institute for Fusion Science(核聚变科学研究所)
Zonal flow suppression of turbulent transport in the optimized stellarators W7-X and QSTK
Indian Institute of Science(印度科学学院);Institute for Plasma Research(等离子体研究所);Homi Bhabha National Institute(霍米·巴巴国立学院);University of California Irvine(加州大学尔湾分校)
Nonlinear generation of global zonal structures in gyrokinetic simulations of TCV and ASDEX Upgrade magnetic configurations
Max-Planck-Institut für Plasmaphysik(马克斯·普朗克等离子体物理研究所);De Vinci Higher Education, De Vinci Research Center(德芬奇高等教育,德芬奇研究中心);Institute of Physics, University of Greifswald(格赖夫斯瓦尔德大学物理研究所);École Polytechnique Fédérale de Lausanne, Swiss Plasma Center(洛桑联邦理工学院,瑞士等离子体中心)
The theoretical study on intermittency and propagation of geodesic acoustic mode in L- mode discharge near tokamak edge
通过一个系统发展的理论,我们证明了[Y. Z. Zhang,Z. Y. Liu,T. Xie,S. M. Mahajan和J. Liu,Physics of Plasmas 24,122304(2017)]与托卡马克中观察到的测地声学模式(GAM)的间歇性激发和传播高度相关。虽然许多数值模拟观察到的现象,这是第一个理论,揭示了GAM间歇性激发和传播背后的物理机制。前面的工作是基于与环形离子温度梯度(ITG)模式相关的微观湍流和基于板的带状流唯象模型。当系统中引入全环面效应时,出现了两个分支的纬向流:环面修正的低频纬向流(TLFZF)和GAM,这就需要对GAM和TLFZF进行统一的研究。事实上,我们观察到的过渡(衰变)从空穴到瞬子是由漂移波的径向群速度的快速过零触发,并被发现是强烈相关的GAM发病。因此,在数值实验中确定了在真实机器中观察到的间歇性GAM所特有的许多功能。结果将以图形和电影的形式显示;首先是单个中心有理曲面,然后是耦合的多个中心有理曲面。首先显示的周期性爆发消失,取而代之的是不规则的,更类似于GAM实验中观察到的间歇性特征。
Information Propagation in Predator-Prey Dynamics of Turbulent Plasma
The University of Osaka(大阪大学);College of Industrial Technology, Nihon University(日本大学生产工学部);National Institute for Fusion Science, National Institutes of National Sciences(国立研究開発法人核融合科学研究所);The Graduate University for Advanced Studies, SOKENDAI(総合研究大学院大学)