The dominant wavelength range of edge impurity emissions moves from the visible range to the vacuum ultraviolet (VUV) range, as heating power increasing in the Experimental Advanced Superconducting Tokamak (EAST). The measurement provided by the existing visible spectroscopies in EAST is not sufficient for impurity transport studies for high-parameters plasmas. Therefore, in this study, a VUV spectroscopy is newly developed to measure edge impurity emissions in EAST. One Seya-Namioka VUV spectrometer (McPherson 234/302) is used in the system, equipped with a concave-corrected holographic grating with groove density of 600 grooves mm –1 . Impurity line emissions can be observed in the wavelength range of λ = 50–700 nm, covering VUV, near ultraviolet and visible ranges. The observed vertical range is Z = −350–350 mm. The minimum sampling time can be set to 5 ms under full vertical binning (FVB) mode. VUV spectroscopy has been used to measure the edge impurit...

中文翻译：

---

用于测量EAST托卡马克中边缘杂质排放的真空紫外光谱学的发展

随着实验高级超导托卡马克（EAST）中加热功率的增加，边缘杂质排放的主要波长范围从可见光范围移至真空紫外（VUV）范围。EAST中现有可见光谱仪提供的测量值不足以进行高参数等离子体的杂质迁移研究。因此，在这项研究中，新开发了VUV光谱仪来测量EAST中的边缘杂质排放。系统中使用了一台Seya-Namioka VUV光谱仪（McPherson 234/302），该仪器配备了凹面校正的全息光栅，其凹槽密度为600凹槽mm –1。可以在λ= 50–700 nm的波长范围内观察到杂质线发射，涵盖VUV，近紫外和可见光范围。观察到的垂直范围为Z = −350–350 mm。在完全垂直合并（FVB）模式下，最小采样时间可以设置为5 ms。VUV光谱已用于测量边缘杂质。