Characterization of small, Type V edge-localized modes in the National Spherical Torus Experiment
Characterization of small, Type V edge-localized modes in the National Spherical Torus Experiment
复制标题
DOI：
10.1063/1.2226986
复制
发表时间：
2006-09
影响因子：
2.2
通讯作者：
R. Maingi;M. Bell;E. Fredrickson;K. Lee;R. Maqueda;P. Snyder;K. Tritz;S. Zweben;R. Bell
中科院分区：
文献类型：
--
作者：
R. Maingi;M. Bell;E. Fredrickson;K. Lee;R. Maqueda;P. Snyder;K. Tritz;S. Zweben;R. Bell
在聚变领域，国际上进行了大量的研究工作，以确定托卡马克的运行机制，这些机制具有小的或没有来自边缘等离子体的粒子和功率的周期性爆发，称为边缘局部模式（ELM）。虽然在文献中已经提出了几个候选制度，但很少有关于小型ELMs本身特性的文章。一个这样的小ELM区域，也被称为V型ELM区域，最近在国家球形环面实验中被确定[M。Ono，S. M. Kaye，Y. K. M. Peng等人，Nucl. Fusion 40，557（2000）]。在本文中，V型ELMs的空间和时间结构，测量几个不同的诊断。V型ELM的合成图像是一个不稳定性，有一个或两个灯丝在105 - 10 km闪烁处沿与等离子体电流和中性束注入方向相反的方向旋转。V型ELMs的环形范围通常为105 m，而交叉场（径向）扩展为...
There has been a substantial international research effort in the fusion community to identify tokamak operating regimes with either small or no periodic bursts of particles and power from the edge plasma, known as edge-localized modes (ELMs). While several candidate regimes have been presented in the literature, very little has been published on the characteristics of the small ELMs themselves. One such small ELM regime, also known as the Type V ELM regime, was recently identified in the National Spherical Torus Experiment [M. Ono, S. M. Kaye, Y.-K. M. Peng et al., Nucl. Fusion 40, 557 (2000)]. In this paper, the spatial and temporal structure of the Type V ELMs is presented, as measured by several different diagnostics. The composite picture of the Type V ELM is of an instability with one or two filaments that rotate toroidally at ∼5–10km∕s, in the direction opposite to the plasma current and neutral beam injection. The toroidal extent of Type V ELMs is typically ∼5m, whereas the cross-field (radial) ex...