Tokuzawa T, Yoshida M, Imazawa R, Nakagawa S, Inagaki S, Kin F, Chiba S, Suzuki N, Nasu T, Fujisawa A, Ida K
National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan.
The Graduate University for Advanced Studies, SOKENDAI, Toki 509-5292, Japan.
Rev Sci Instrum. 2024 Aug 1;95(8). doi: 10.1063/5.0218359.
A preparatory study is underway to investigate the feasibility study of high-energetic, non-thermal electron distribution function measurements using a vertical-viewing electron cyclotron emission (ECE) diagnostic on JT-60SA. The system is designed to detect broad ECE spectra (70-260 GHz) due to the second, third, and fourth harmonics using a focusing optics system with four quasi-optical mirrors in the upper port of JT-60SA. A Gaussian beam optics design is performed in vacuum, and ray tracing calculations are performed in plasma using the TRAVIS code to investigate density characteristics. A ceramic viewing dump is also designed to reduce the effects of multiple reflections from the opposing vacuum vessel surface.
正在进行一项预备研究，以调查在JT-60SA上使用垂直观测电子回旋辐射（ECE）诊断方法测量高能非热电子分布函数的可行性。该系统旨在利用JT-60SA上部端口的带有四个准光学镜的聚焦光学系统，检测由二次、三次和四次谐波产生的宽ECE光谱（70-260GHz）。在真空中进行高斯光束光学设计，并使用TRAVIS代码在等离子体中进行光线追踪计算，以研究密度特性。还设计了一个陶瓷观测转储装置，以减少来自相对真空容器表面的多次反射的影响。
