Detachment stabilization with n/m=1/1 resonant magnetic perturbation field applied to the stochastic magnetic boundary of the Large Helical Device
Detachment stabilization with n/m=1/1 resonant magnetic perturbation field applied to the stochastic magnetic boundary of the Large Helical Device
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DOI：
10.1063/1.3368681
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发表时间：
2010-04
影响因子：
2.2
通讯作者：
M. Kobayashi;S. Masuzaki;I. Yamada;N. Tamura;Y. Feng;K. Sato;M. Goto;Y. Narushima;T. Akiyama
中科院分区：
文献类型：
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作者：
M. Kobayashi;S. Masuzaki;I. Yamada;N. Tamura;Y. Feng;K. Sato;M. Goto;Y. Narushima;T. Akiyama
研究发现，在大螺旋装置（LHD）的随机磁边界中，由n/m=1/1共振磁扰动场产生的残余岛结构[A. Komori等人，Nucl. Fusion 49，104015（2009）]对辐射等离子体的形成具有稳定作用，实现了稳定持续的偏滤器分离操作，而核心等离子体不受影响。来自几个诊断的数据（电子温度和密度、偏滤器粒子通量的辐射和时间演变的分布）表明在岛的X点周围选择性冷却，从而在那里达到峰值辐射，其在整个分离阶段稳定在最后闭合通量表面之外。真空紫外光谱测量的高Z杂质（铁）的排放量显示出显着下降，在分离过程中，表明核心等离子体净化。利用三维边界输运程序edge Monte Carlo 3D（EMC 3）[Y. Feng等人，Contrib. Plasma Phys. 44，57（2.
It is found that the remnant island structure created by n/m=1/1 resonant magnetic perturbation field in the stochastic magnetic boundary of the Large Helical Device (LHD) [A. Komori et al., Nucl. Fusion 49, 104015 (2009)] has a stabilizing effect on formation of radiating plasma, realizing stably sustained divertor detachment operation with the core plasma being unaffected. The data from the several diagnostics, (profiles of electron temperature and density, radiation and temporal evolution of divertor particle flux) indicate selective cooling around X-point of the island and thus peaked radiation there, which is stabilized outside of the last closed flux surface throughout the detachment phase. The vacuum ultraviolet spectroscopy measurements of high Z impurity (iron) emission shows significant decrease during the detachment, indicating core plasma decontamination. The results from the three-dimensional (3D) edge transport code, edge Monte Carlo 3D (EMC3) [Y. Feng et al., Contrib. Plasma Phys. 44, 57 (2...