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Significant enhancment of the accuracy of impurity determination in vacuums using classification one-point laser-induced breakdown spectroscopy

文献类型：期刊论文

作者Bai, Xue1; Hai, Ran1; Liu, Zehua1; He, Zhonglin1; Hu, Zhenhua2; Xu, Guoliang2; Li, Cong1; Wu, Ding1; Ding, Hongbin1
刊名OPTICS EXPRESS
出版日期2024-09-23
卷号32
ISSN号1094-4087
DOI10.1364/OE.538055
通讯作者Hai, Ran(rhai@dlut.edu.cn)
英文摘要Laser-induced breakdown spectroscopy (LIBS) is a highly promising technique for the in-situ, real-time diagnosis of impurity deposits on the inner walls of tokamak devices. The deposited impurity on plasma-facing materials (PFCs) pose a significant risk to the steadystate operation of the tokamak. Under vacuum conditions, an accurate quantitative analysis of the thin co-deposition layers is a technical challenge. In this study, 30 co-deposited layer samples of tungsten (10.0-92.3 a.t.%), molybdenum (2.0-77.8 a.t.%), iron (2.9-12.1 a.t.%) and copper (1.2-18.7 a.t.%) were prepared to simulate the co-deposition layers found on PFCs in Experimental Advanced Superconducting Tokamak (EAST). A variation of the CF-LIBS algorithm, the so-called One Point Calibrated LIBS (OPC-LIBS), was employed to analyze these co-deposited layer samples under conditions of 5 x 10-5 mbar. It was found that the matrix matching degree among the measured samples and the selection of standard samples play a decisive role in the quantitative analysis capability of OPC-LIBS. In actual situations, the composition of the co-deposited impurity layers at different locations in the Tokamak will be quite different. We addressed this challenge by developing the Classified OPC-LIBS (COPC-LIBS) model, an enhanced version of OPC-LIBS with pre-classification to offset matrix effects in LIBS analysis. For tungsten in the co-deposition layers, the root mean square (RMSE) calculated by the CF-LIBS method was 14.7, the OPC-LIBS method was 11.5, and the newly invented COPC-LIBS was reduced to only 5.1. The COPC-LIBS method is a highly efficient technique that can precisely measure the distribution of co-deposited layers on the surface of inner wall materials. The diagnostic data obtained from this method will provide valuable insights into the interaction between plasma and wall materials during the operation of fusion devices.
WOS关键词DIAGNOSTICS ; CALIBRATION ; LINES
资助项目National MCF Energy RD Program[2022YFE03180100] ; National Key Research and Development Program of China[2023YFF0714901] ; National Key Research and Development Program of China[2023YFF0714902] ; National Key Research and Development Program of China[2023YFF0714903] ; National Natural Science Foundation of China[12375208] ; National Natural Science Foundation of China[51837008]
WOS研究方向Optics
语种英语
WOS记录号WOS:001326964600002
出版者Optica Publishing Group
资助机构National MCF Energy RD Program ; National Key Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135815]  
专题中国科学院合肥物质科学研究院
通讯作者Hai, Ran
作者单位1.Dalian Univ Technol, Sch Phys, Key Lab Mat Modificat Laser Ion & Electron Beams, Chinese Minist Educ, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Bai, Xue,Hai, Ran,Liu, Zehua,et al. Significant enhancment of the accuracy of impurity determination in vacuums using classification one-point laser-induced breakdown spectroscopy[J]. OPTICS EXPRESS,2024,32.
APA Bai, Xue.,Hai, Ran.,Liu, Zehua.,He, Zhonglin.,Hu, Zhenhua.,...&Ding, Hongbin.(2024).Significant enhancment of the accuracy of impurity determination in vacuums using classification one-point laser-induced breakdown spectroscopy.OPTICS EXPRESS,32.
MLA Bai, Xue,et al."Significant enhancment of the accuracy of impurity determination in vacuums using classification one-point laser-induced breakdown spectroscopy".OPTICS EXPRESS 32(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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