Ko Won-Ha, Lee H H, Jeon Y M, Ida K, Lee J H, Yoon S W, Lee K D, Bae Y S, Oh Y K, Kwak J G
National Fusion Research Institute, Daejeon, South Korea.
National Institute for Fusion Science, Nagoya, Japan.
Rev Sci Instrum. 2014 Nov;85(11):11E413. doi: 10.1063/1.4890402.
Measuring rotation profiles with a reliable spatial resolution is one of the critical diagnostics in understanding the plasma behavior especially for the edge transport. In the KSTAR experiments, it has been consistently observed from the charge exchange spectroscopy measurements that the magnetic perturbations not only suppresses edge localized modes (ELMs) but also reduces toroidal rotations. In this paper, toroidal velocities of the carbon impurity and their profile evolutions during ELMy and ELM-suppressed phases are presented. The rotation profiles are shown to collapse immediately after an ELM burst and continue to build up until the next burst that accompanies another collapse. Toroidal rotations following the resonant magnetic perturbations applications are observed to be reduced along with the ELMs suppressed.
以可靠的空间分辨率测量旋转轮廓是理解等离子体行为尤其是边缘输运的关键诊断方法之一。在韩国超导托卡马克先进研究装置（KSTAR）实验中，通过电荷交换光谱测量一直观察到，磁扰动不仅能抑制边缘局域模（ELM），还能降低环向旋转。本文给出了碳杂质的环向速度及其在有ELM和无ELM阶段的轮廓演变。结果表明，在一次ELM爆发后，旋转轮廓立即崩塌，并持续建立，直到下一次爆发伴随另一次崩塌。观察到在施加共振磁扰动后，随着ELM被抑制，环向旋转也会降低。
