Ogane S, Shikama T, Zushi H, Hasuo M
Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 615-8540, Japan.
Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan.
Rev Sci Instrum. 2015 Oct;86(10):103507. doi: 10.1063/1.4931804.
In magnetically confined torus plasmas, the local emission intensity, temperature, and flow velocity of atoms in the inboard and outboard scrape-off layers can be separately measured by a passive emission spectroscopy assisted by observation of the Zeeman splitting in their spectral line shape. To utilize this technique, a near-infrared interference spectrometer optimized for the observation of the helium 2(3)S-2(3)P transition spectral line (wavelength 1083 nm) has been developed. The applicability of the technique to actual torus devices is elucidated by calculating the spectral line shapes expected to be observed in LHD and QUEST (Q-shu University Experiment with Steady State Spherical Tokamak). In addition, the Zeeman effect on the spectral line shape is measured using a glow-discharge tube installed in a superconducting magnet.
在磁约束环形等离子体中，通过被动发射光谱法，并借助观察原子光谱线形状中的塞曼分裂，可分别测量内侧和外侧刮削层中原子的局部发射强度、温度和流速。为了利用该技术，已开发出一种针对氦2(3)S-2(3)P跃迁光谱线（波长1083nm）观测进行优化的近红外干涉光谱仪。通过计算预期在大型螺旋装置（LHD）和QUEST（筑波大学稳态球形托卡马克实验）中观测到的光谱线形状，阐明了该技术对实际环形装置的适用性。此外，使用安装在超导磁体中的辉光放电管测量了塞曼效应对光谱线形状的影响。
