Song Inwoo, Seon C R, Hong Joohwan, An Y H, Barnsley R, Guirlet R, Choe Wonho
Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea.
National Fusion Research Institute, 169-148 Gwahak-ro, Yuseong-gu, Daejeon 34133, South Korea.
Rev Sci Instrum. 2017 Sep;88(9):093509. doi: 10.1063/1.5002077.
A compact advanced extreme-ultraviolet (EUV) spectrometer operating in the EUV wavelength range of a few nanometers to measure spatially resolved line emissions from tungsten (W) was developed for studying W transport in fusion plasmas. This system consists of two perpendicularly crossed slits-an entrance aperture and a space-resolved slit-inside a chamber operating as a pinhole, which enables the system to obtain a spatial distribution of line emissions. Moreover, a so-called v-shaped slit was devised to manage the aperture size for measuring the spatial resolution of the system caused by the finite width of the pinhole. A back-illuminated charge-coupled device was used as a detector with 2048 × 512 active pixels, each with dimensions of 13.5 × 13.5 μm. After the alignment and installation on Korea superconducting tokamak advanced research, the preliminary results were obtained during the 2016 campaign. Several well-known carbon atomic lines in the 2-7 nm range originating from intrinsic carbon impurities were observed and used for wavelength calibration. Further, the time behavior of their spatial distributions is presented.
为了研究聚变等离子体中的钨传输，开发了一种紧凑型先进极紫外（EUV）光谱仪，其在几纳米的EUV波长范围内运行，用于测量钨（W）的空间分辨线发射。该系统由两个垂直交叉的狭缝组成——一个入口孔径和一个空间分辨狭缝——位于一个用作针孔的腔室内，这使得系统能够获得线发射的空间分布。此外，还设计了一个所谓的V形狭缝来控制孔径大小，以测量由针孔有限宽度引起的系统空间分辨率。使用背照式电荷耦合器件作为探测器，其具有2048×512个有源像素，每个像素的尺寸为13.5×13.5μm。在韩国超导托卡马克先进研究装置上进行对准和安装后，在2016年的实验中获得了初步结果。观察到了源自本征碳杂质的2 - 7nm范围内的几条著名碳原子线，并用于波长校准。此外，还给出了它们空间分布的时间行为。
