Fast ion induced shearing of 2D Alfvén eigenmodes measured by electron cyclotron emission imaging.
Fast ion induced shearing of 2D Alfvén eigenmodes measured by electron cyclotron emission imaging.
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DOI：
10.1103/physrevlett.106.075003
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发表时间：
2011-02
影响因子：
8.6
通讯作者：
B. Tobias;I. Classen;C. Domier;W. Heidbrink;N. C. Luhmann;R. Nazikian;H. Park;D. Spong;M. A. Zeel
中科院分区：
文献类型：
--
作者：
B. Tobias;I. Classen;C. Domier;W. Heidbrink;N. C. Luhmann;R. Nazikian;H. Park;D. Spong;M. A. Zeel
利用电子回旋发射成像（ECEI）在DIII-D托卡马克上获得了电子温度扰动的二维图像，并与使用理想MHD和混合MHD-回旋流体代码数值模拟得到的alfv<s:1>本征模结构进行了比较。虽然观测的许多特征被发现与使用理想MHD代码（NOVA）的模拟非常一致，但其他特征明显地揭示了快离子对模式结构的影响。非微扰混合mhd -陀螺流体模型TAEFL很好地描述了这些特征。
Two-dimensional images of electron temperature perturbations are obtained with electron cyclotron emission imaging (ECEI) on the DIII-D tokamak and compared to Alfvén eigenmode structures obtained by numerical modeling using both ideal MHD and hybrid MHD-gyrofluid codes. While many features of the observations are found to be in excellent agreement with simulations using an ideal MHD code (NOVA), other characteristics distinctly reveal the influence of fast ions on the mode structures. These features are found to be well described by the nonperturbative hybrid MHD-gyrofluid model TAEFL.