Progress in the peeling-ballooning model of edge localized modes: Numerical studies of nonlinear dynamicsa)
Progress in the peeling-ballooning model of edge localized modes: Numerical studies of nonlinear dynamicsa)
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DOI：
10.1063/1.1873792
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发表时间：
2005-04
影响因子：
2.2
通讯作者：
P. Snyder;H. Wilson;X. Xu
中科院分区：
文献类型：
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作者：
P. Snyder;H. Wilson;X. Xu
采用非线性三维电磁仿真来研究由中间波长剥离-气球模式驱动的边缘局域模式 (ELM) 的动力学。研究发现，模态的早期行为与线性理想剥离气球模态理论的预期相似，模态以阿尔文频率的一小部分线性增长。在非线性阶段，模式爆炸性增长，形成许多延伸的细丝，这些细丝从外部封闭通量区域快速传播到开放通量区域，朝向外侧壁。观察到与非线性气球理论的相似性以及额外的复杂性。与观察结果的比较揭示了许多相似之处。讨论了模拟的影响以及对完整 ELM 碰撞动力学的建议。
Nonlinear three-dimensional electromagnetic simulations are employed to study the dynamics of edge localized modes (ELMs) driven by intermediate wavelength peeling-ballooning modes. It is found that the early behavior of the modes is similar to expectations from linear, ideal peeling-ballooning mode theory, with the modes growing linearly at a fraction of the Alfven frequency. In the nonlinear phase, the modes grow explosively, forming a number of extended filaments which propagate rapidly from the outer closed flux region into the open flux region toward the outboard wall. Similarities to nonlinear ballooning theory as well as additional complexities are observed. Comparison to observations reveals a number of similarities. Implications of the simulations and proposals for the dynamics of the full ELM crash are discussed.