M3D-K simulations of sawteeth and energetic particle transport in tokamak plasmas
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论文类型：期刊论文
第一作者：Shen, Wei
通讯作者：Shen, W (reprint author), Zhejiang Univ, Inst Fus Theory & Simulat, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China.
合写作者：Fu, G. Y.,Sheng, Zheng-Mao,Breslau, J. A.,Wang, Feng
发表时间：2014-09-01
发表刊物：PHYSICS OF PLASMAS
收录刊物：Scopus、EI、SCIE
文献类型：J
卷号：21
期号：9
ISSN号：1070-664X
摘要：Nonlinear simulations of sawteeth and related energetic particle transport are carried out using the kinetic/magnetohydrodynamic (MHD) hybrid code M3D-K. MHD simulations show repeated sawtooth cycles for a model tokamak equilibrium. Furthermore, test particle simulations are carried out to study the energetic particle transport due to a sawtooth crash. The results show that energetic particles are redistributed radially in the plasma core, depending on pitch angle and energy. For trapped particles, the redistribution occurs for particle energy below a critical value in agreement with existing theories. For co-passing particles, the redistribution is strong with little dependence on particle energy. In contrast, the redistribution level of counter-passing particles decreases with increasing particle energy. (C) 2014 AIP Publishing LLC.