A categorization of tearing mode onset in tokamaks via nonlinear simulation
A categorization of tearing mode onset in tokamaks via nonlinear simulation
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DOI：
10.1088/0029-5515/45/9/018
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发表时间：
2005-09
期刊：
影响因子：
3.3
通讯作者：
D. Brennan;S. Kruger;T. Gianakon;D. Schnack
中科院分区：
文献类型：
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作者：
D. Brennan;S. Kruger;T. Gianakon;D. Schnack
用DIII-D平衡重构作为NIMROD非线性三维电阻磁流体力学代码的初始条件，提出了托卡马克撕裂模式发生的理论分类（Sovinec . r . et al . 2004 J. Comput.）。物理学报，195（355）。撕裂模式的发生机制分为自发、混合和强迫三种类型，这取决于线性不稳定性与强迫重连的重要性。将生长撕裂模式在时变线性不稳定驱动、模式间非线性耦合和新古典自举驱动的模拟中早期演化的物理特性与实验数据进行了比较，以解释这种定性分类。重要的影响，如旋转剪切和热各向异性，被包括在内，并证实了这种分类与DIII-D的实验观察结果是一致的。
A theoretical categorization of the onset of tearing modes in tokamaks is presented using DIII-D equilibrium reconstructions as initial conditions in the NIMROD nonlinear three-dimensional resistive magnetohydrodynamic code (Sovinec C.R. et al 2004 J. Comput. Phys. 195 355). The onset mechanism of tearing modes are categorized into three types: spontaneous, mixed and forced depending on the importance of linear instability versus forced reconnection. The physics of the early evolution of growing tearing modes in simulations with time varying linear instability drive, nonlinear coupling between modes and neoclassical bootstrap drive are compared to experimental data to explain this qualitative categorization. Important effects, such as rotational shear and thermal anisotropy, are included and confirm that this categorization is consistent with the experimental observations in DIII-D.