Molecular dynamics simulation and modelling on the dust-wall interactions in tokamak

doi:10.1016/j.jnucmat.2022.154048

	Molecular dynamics simulation and modelling on the dust-wall interactions in tokamak
	Niu, Guo-Jian; Xu, Qian; Yang, Zhong-Shi; He, Tao; Nian, Fei-Fei; Wang, Rong; Luo, Guang-Nan
刊名	JOURNAL OF NUCLEAR MATERIALS
	2022-12-15
卷号	572
关键词	Molecular dynamics Wall Plasma -facing material Dust Material damage
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2022.154048
通讯作者	Yang, Zhong-Shi(zsyang@ipp.ac.cn) ; Luo, Guang-Nan(gnluo@ipp.ac.cn)
英文摘要	Dust velocity in fusion devices covers a wide range (several hundreds of m/s to over 10 km/s), which can cause various interactions between energetic dust grains and wall materials. Dust grain with low energy can influence the wall properties by deposition. Intense dust-wall interactions can cause serious wall damage such as sputtering, degradation, deformation and so on. As beryllium and tungsten are the material of the first wall and divertor, respectively, systematically molecular dynamics simulations have been performed to study the interactions between beryllium/tungsten dust and the beryllium/tungsten wall in the present study. A wide range of dust velocity has been considered to cover the velocity from experiments. Our result shows that the influences of dust on the wall are greatly affected by the impact velocity of dust grains and the properties of the wall material. A detailed analysis shows that the dust -wall interaction can be divided into four levels and an analytical model has been developed to explain the mechanism. Character velocities that separate the interaction levels are also provided by the model. The comparison between the MD result and the model shows a good agreement. Our result is helpful for the understanding of the mechanisms and the prediction of dust-wall interactions. (c) 2022 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China (NSFC)[11705233] ; National Natural Science Foundation of China (NSFC)[11875287] ; National Natural Science Foundation of China (NSFC)[11975260] ; National Key Research & Development Program of China[2018YFE0303103] ; IAEA Coordinated Research Project[F43026]
WOS关键词	FUSION DEVICES ; PLASMA
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000885308900007
资助机构	National Natural Science Foundation of China (NSFC) ; National Key Research & Development Program of China ; IAEA Coordinated Research Project
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131703]
专题	中国科学院合肥物质科学研究院
通讯作者	Yang, Zhong-Shi; Luo, Guang-Nan
作者单位	Chinese Acad Sci, Inst Plasma Phys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Niu, Guo-Jian,Xu, Qian,Yang, Zhong-Shi,et al. Molecular dynamics simulation and modelling on the dust-wall interactions in tokamak[J]. JOURNAL OF NUCLEAR MATERIALS,2022,572.
APA	Niu, Guo-Jian.,Xu, Qian.,Yang, Zhong-Shi.,He, Tao.,Nian, Fei-Fei.,...&Luo, Guang-Nan.(2022).Molecular dynamics simulation and modelling on the dust-wall interactions in tokamak.JOURNAL OF NUCLEAR MATERIALS,572.
MLA	Niu, Guo-Jian,et al."Molecular dynamics simulation and modelling on the dust-wall interactions in tokamak".JOURNAL OF NUCLEAR MATERIALS 572(2022).