Yun G S, Lee W, Choi M J, Kim J B, Park H K, Domier C W, Tobias B, Liang T, Kong X, Luhmann N C, Donné A J H
Pohang University of Science and Technology, Pohang, Gyungbuk 790-784, South Korea.
Rev Sci Instrum. 2010 Oct;81(10):10D930. doi: 10.1063/1.3483209.
The ECE imaging (ECEI) diagnostic tested on the TEXTOR tokamak revealed the sawtooth reconnection physics in unprecedented detail, including the first observation of high-field-side crash and collective heat transport [H. K. Park, N. C. Luhmann, Jr., A. J. H. Donné et al., Phys. Rev. Lett. 96, 195003 (2006)]. An improved ECEI system capable of visualizing both high- and low-field sides simultaneously with considerably better spatial coverage has been developed for the KSTAR tokamak in order to capture the full picture of core MHD dynamics. Direct 2D imaging of other MHD phenomena such as tearing modes, edge localized modes, and even Alfvén eigenmodes is expected to be feasible. Use of ECE images of the optically thin edge region to recover 2D electron density changes during L/H mode transitions is also envisioned, providing powerful information about the underlying physics. The influence of density fluctuations on optically thin ECE is discussed.
在TEXTOR托卡马克上进行测试的极向电子回旋辐射成像（ECEI）诊断以前所未有的细节揭示了锯齿重连物理，包括首次观测到高场侧崩溃和集体热输运[H. K. 帕克、小N. C. 卢曼、A. J. H. 唐内等人，《物理评论快报》96, 195003 (2006)]。为了全面捕捉芯部磁流体动力学动态，已为KSTAR托卡马克开发了一种改进的ECEI系统，该系统能够同时可视化高场侧和低场侧，且具有更好得多的空间覆盖范围。预计对其他磁流体动力学现象（如撕裂模、边缘局域模，甚至阿尔文本征模）进行直接二维成像将是可行的。还设想利用光学薄边缘区域的ECE图像来恢复L/H模转换期间的二维电子密度变化，从而提供有关潜在物理的有力信息。文中讨论了密度涨落对光学薄ECE的影响。
