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Experimental study on metallic impurity behavior with boronization wall conditioning in EAST tokamak

文献类型：期刊论文

作者Cheng, Yunxin2; Zhang, Ling2; Hu, Ailan2; Morita, Shigeru3; Zhang, Wenmin2,4; Zhou, Chengxi2; Mitnik, Dario1; Zhang, Fengling2,4; Ma, Jiuyang2,4; Li, Zhengwei2,5
刊名NUCLEAR MATERIALS AND ENERGY
出版日期2024-12-01
卷号41
关键词EAST Plasma-facing materials Boronization wall conditioning Mertallic impurity EUV spectrometer
DOI10.1016/j.nme.2024.101744
通讯作者Zhang, Ling(zhangling@ipp.ac.cn) ; Liu, Haiqing(hqliu@ipp.ac.cn)
英文摘要Operation of EAST tokamak with full metal wall without any wall conditioning are attempted in 2023 and 2024 experimental campaign to address the issues related to ITER tungsten wall operation. It is found that H-mode plasma could be sustained even with a substantial increase in metallic impurity content caused by strong plasma-wall interaction under uncoated metal wall. Boronization wall conditioning is therefore performed to improve the plasma performance with higher injected power. This study aims to quantitatively assess the impact of boronization wall conditioning on metallic impurity concentration and behavior in the EAST tokamak. It is then proved to be an effective wall conditioning approach for significantly controlling high-Z impurity content. In this work, the impurity spectra at extreme ultraviolet (EUV) wavelength range measured by sets of fast-time-response and space-resolved EUV spectrometers are widely used in the data analysis. The variation in the boron content in plasma after boronization are investigated by monitoring the 2nd order of B V line at 48.59 & Aring;. It is found that the persistence time of boron in EAST device after a boronization with 10 g of carborane (C2B10H12) is about 2000 s (similar to 150 shots) of discharge duration. The impact of different wall conditions (uncoated metal wall and boron coated wall) on metallic impurity content are then quantitatively studied. After boronization, the concentration of tungsten (C-W) and molybdenum (C-Mo) dropped by 85 %, e. g., from 2.0 x 10(-4) to 4.1 x 10(-5) and from 4.6 x 10(-5) to 6.3 x 10(-6), respectively. While the concentration of copper (C-Cu) and iron (C-Fe) decreased by approximately 50 % and 65 %, respectively, e. g., from 4.3 x 10(-5) to 2.1 x 10(-5) and from 2.0 x 10(-4) to 6.9 x 10(-5). A comparison of the line emission profiles from tungsten ions of W26+ - W32+ and W43+ before and after boronization reveals an overall reduction in the intensity while without obvious change in the profile shape, which suggests a reduction in metallic impurities source after boronization instead of altering impurity transport in core plasma significantly.
WOS关键词H-MODE ; PLASMAS
资助项目National MCF Energy RD D Program[2022YFE03180400] ; National MCF Energy RD D Program[2022YFE03020004] ; National Natural Science Foundation of China[12322512] ; Chinese Academy of Sciences President's International Fellowship Initiative (PIFI)[2024PVA0074] ; Chinese Academy of Sciences President's International Fellowship Initiative (PIFI)[2025PVA0060]
WOS研究方向Nuclear Science & Technology
语种英语
WOS记录号WOS:001321889300001
出版者ELSEVIER
资助机构National MCF Energy RD D Program ; National Natural Science Foundation of China ; Chinese Academy of Sciences President's International Fellowship Initiative (PIFI)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135595]  
专题中国科学院合肥物质科学研究院
通讯作者Zhang, Ling; Liu, Haiqing
作者单位1.Univ Buenos Aires, CONICET, Inst Astron & Fis Espacio, RA-1428 Buenos Aires, Argentina
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
3.Natl Inst Fus Sci, Gifu 5095292, Japan
4.Univ Sci & Technol China, Hefei 230026, Peoples R China
5.Anhui Univ, Hefei 230601, Peoples R China
推荐引用方式
GB/T 7714		 Cheng, Yunxin,Zhang, Ling,Hu, Ailan,et al. Experimental study on metallic impurity behavior with boronization wall conditioning in EAST tokamak[J]. NUCLEAR MATERIALS AND ENERGY,2024,41.
APA Cheng, Yunxin.,Zhang, Ling.,Hu, Ailan.,Morita, Shigeru.,Zhang, Wenmin.,...&Liu, Haiqing.(2024).Experimental study on metallic impurity behavior with boronization wall conditioning in EAST tokamak.NUCLEAR MATERIALS AND ENERGY,41.
MLA Cheng, Yunxin,et al."Experimental study on metallic impurity behavior with boronization wall conditioning in EAST tokamak".NUCLEAR MATERIALS AND ENERGY 41(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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