Yoo J W, Kim J, Lee M W, Kang J, Ko W-H, Oh S G, Ko J, Lee J H, Nam Y U, Jung L, Park B H, Yoon S W
Korea Institute of Fusion Energy, 169-148 Gwahak-ro, Yuseong-gu, Daejeon 34133, Republic of Korea.
Ajou University, 206, World Cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16499, Republic of Korea.
Rev Sci Instrum. 2021 Apr 1;92(4):043504. doi: 10.1063/5.0040559.
A fast-ion Dα (FIDA) diagnostics system was installed for core and edge measurements on KSTAR. This system has two tangential FIDA arrays that cover both blue- and redshifted Dα lines (cold: 656.09 nm) in active views along the neutral beam 1 A centerline. The spectral band is 647-662.5 nm, and it covers the Doppler shift of the emission from the maximum energy of the neutral beam (100 keV). A curved filter strip with a motorized stage adequately prevents saturation of the electron multiplying charge-coupled device signal by the cold Dα line from the plasma edge. From comparisons of the measured spectra and FIDASIM modeling code, the FIDA spectra are well matched quantitatively. Moreover, the first measurements show that the FIDA radiance agrees with the neutron rate in the time trace during external heating and perturbation. In addition, responses are observed in the core FIDA radiance during the edge-localized mode cycle.
一个快速离子Dα（FIDA）诊断系统被安装在KSTAR上用于芯部和边缘测量。该系统有两个切向FIDA阵列，它们在沿着中性束1A中心线的有源视场中覆盖蓝移和红移的Dα线（冷：656.09纳米）。光谱带为647 - 662.5纳米，它涵盖了从中性束最大能量（100 keV）发射的多普勒频移。带有电动平台的弯曲滤光片条可充分防止来自等离子体边缘的冷Dα线使电子倍增电荷耦合器件信号饱和。通过对测量光谱和FIDASIM建模代码的比较，FIDA光谱在定量上匹配良好。此外，首次测量表明，在外部加热和扰动期间，FIDA辐射亮度与时间迹线中的中子率一致。另外，在边缘局域模周期期间，在芯部FIDA辐射亮度中观察到了响应。
