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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Analysis of deposited impurity material on the surface of the optical window of the Tokamak using LIBS
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Analysis of deposited impurity material on the surface of the optical window of the Tokamak using LIBS

机译：使用LIBS分析在托卡马克光学窗口表面上沉积的杂质材料

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摘要

The emission spectra emitted from the laser-induced plasma of the optical window of Aditya Tokamak have been studied to identify the eroded materials deposited on its surface. Different layers of the window, such as the impurity deposited layer, antireflection coating and main matrix of the window material, have been identified. Laser-induced breakdown spectroscopy (LIBS) spectra of the impurity layer (first layer) shows the presence of spectral lines of Fe, Cr, Ni, Mn, Mo, Cu, C and O most of which are the components of stainless steel (SS316L) used for the fabrication of the Tokamak. LIBS spectra of the antireflection coating layer (second layer) show the spectral signature of Ca and Mg, whereas in the inner layer (last layer), the spectral lines of Al, Si and B are present. The concentrations of the impurities estimated by CF-LIBS are closely related to the constituents (major and minor) of the SS316L. Principal component analysis using LIBS data was performed to differentiate the different layers (impurity, antireflection coating and main matrix) of the window. The result of the present study demonstrates the capability of LIBS as an in-situ monitoring tool for detection and quantification of elements present in the different layers of the optical window of the Tokamak.
机译：已经研究了从Aditya Tokamak光学窗口的激光诱导等离子体发射的发射光谱，以识别沉积在其表面上的腐蚀物质。已经确定了窗的不同层，例如窗材料的杂质沉积层，抗反射涂层和主基质。杂质层（第一层）的激光诱导击穿光谱（LIBS）光谱显示出Fe，Cr，Ni，Mn，Mo，Cu，C和O的光谱线的存在，其中大部分是不锈钢（SS316L ）用于制造托卡马克。抗反射涂层（第二层）的LIBS光谱显示Ca和Mg的光谱特征，而在内层（最后一层）中，存在Al，Si和B的光谱线。 CF-LIBS估算的杂质浓度与SS316L的成分（主要和次要）密切相关。使用LIBS数据进行主成分分析，以区分窗户的不同层（杂质，抗反射涂层和主基质）。本研究的结果证明了LIBS作为原位监测工具的能力，可以检测和量化Tokamak光学窗口不同层中存在的元素。

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