First measurements of highly ionized impurity emission distribution by grazing-incidence flat-field extreme ultraviolet spectrometer in HL-2A.
First measurements of highly ionized impurity emission distribution by grazing-incidence flat-field extreme ultraviolet spectrometer in HL-2A.
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DOI：
10.1063/1.4891708
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
Z. Cui;C. Dong;Hangyu Zhou;S. Morita;P. Sun;B. Fu;P. Lu;X. Ding;Qingwei Yang;X. Duan
中科院分区：
文献类型：
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作者：
Z. Cui;C. Dong;Hangyu Zhou;S. Morita;P. Sun;B. Fu;P. Lu;X. Ding;Qingwei Yang;X. Duan
在HL-2A装置上研制了一台掠入射平场极紫外（EUV）空间分辨光谱仪，用于同时测量垂直杂质发射剖面的光谱、时间和空间分辨率。光谱仪的工作波长为30-500 nm，采用曲率为5606 mm的镀金变线距全息光栅和尺寸为6.6 × 26.6 mm（2）（255 × 1024像素）的背照式电荷耦合器件。当水平色散谱仪放置在距HL-2A等离子体中心7.5m处时，观测到了HL-2A等离子体的下半部分，其平均小半径为40 cm。当采用垂直宽度为0.5mm的空间分辨狭缝时，获得了12 mm的优异空间分辨率。本征杂质的径向分布在几个电离阶段已被测量与高通量和极低的杂散光。
A space-resolved grazing-incidence flat-field extreme ultraviolet (EUV) spectrometer has been developed in the HL-2A tokamak to measure vertical impurity emission profiles with simultaneous spectral, temporal, and spatial resolution. The spectrometer working in the wavelength range of 30-500 Å has been equipped with a gold-coated varied-line-spacing holographic grating with curvature of 5606 mm and a back illuminated charge-coupled device with size of 6.6 × 26.6 mm(2) (255 × 1024 pixels). A lower half of the HL-2A plasma with averaged minor radius of 40 cm is observed when the spectrometer with horizontal dispersion is placed at a distance of 7.5 m away from the plasma center. An excellent spatial resolution of 12 mm is achieved when a space-resolved slit with vertical width of 0.5 mm is adopted. The radial profiles of intrinsic impurities in several ionization stages have been measured with high throughput and extremely low stray light.