Diffusion and incidence of helium on tungsten surface
文献类型：期刊论文
| 作者 | Wang, Jinlong3,4; Guo, Jinmin4; He, Bingling2; Liu, Daping1; Pan, Xin-Dong3; Li, Xiao-Chun3 ; Luo, Guang-Nan3
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| 刊名 | JOURNAL OF NUCLEAR MATERIALS
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 586 |
| ISSN号 | 0022-3115 |
| 关键词 | Tungsten Helium Irradiation energy Diffusion barrier Depth distribution |
| DOI | 10.1016/j.jnucmat.2023.154689 |
| 通讯作者 | Li, Xiao-Chun(xcli@ipp.ac.cn) |
| 英文摘要 | In this study, we investigated the diffusion and incidence of helium on tungsten surfaces using first principles and molecular dynamics methods. For three common tungsten surfaces (100, 111, 110), we found that the diffusion barrier of helium is positively/negatively correlated with the interatomic spacing/surface atomic density. The diffusion barriers of helium are relatively similar on the three surfaces, ranging from 5.82 to 6.50 eV. The diffusion barrier of helium on the tungsten surface represents the lower limit of the incidence barrier for helium implantation into tungsten. In our simulation, only helium with an incidence energy greater than 7 eV has the potential to be implanted into tungsten. Generally speaking, the implantation ratio of helium increases with increasing incidence energy and decreases with increasing substrate temperature (although the effect is minor). At a constant temperature, the implantation ratio of helium exhibits an exponential relationship with the incidence energy. The depth distribution of helium can be well described by Gamma distribution function, and the shape and scale parameters of the gamma distribution function can be determined based on the mean and variance of the helium depth distribution. The proposed fitting function allows for the quantitative description of the mean and variance of the helium depth distribution based on the incidence conditions (incident energy E and substrate temperature T), thereby determining the helium depth distribution. This has important implications for the in-depth study of helium-induced tungsten surface fuzz formation. |
| WOS关键词 | ELASTIC BAND METHOD ; LOW-ENERGY ; MOLECULAR-DYNAMICS ; BUBBLE FORMATION ; DISSOLUTION ; DEPENDENCE ; POINTS |
| 资助项目 | National Natural Science Foundation of China[11975260] ; National Natural Science Foundation of China[12192281] ; National Natural Science Foundation of China[12204150] ; Anhui Province postdoctoral researchers research activities funding project, People's Republic of China[2021A481] ; China Postdoctoral Science Foundation[2021M703252] ; HFIPS Director's Fund[YZJJ2022QN21] |
| WOS研究方向 | Materials Science ; Nuclear Science & Technology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001075971300001 |
| 资助机构 | National Natural Science Foundation of China ; Anhui Province postdoctoral researchers research activities funding project, People's Republic of China ; China Postdoctoral Science Foundation ; HFIPS Director's Fund |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/132616]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Li, Xiao-Chun |
| 作者单位 | 1.Xinxiang Univ, Dept Phys, Xinxiang, Peoples R China 2.Chaohu Univ, Sch Elect Engn, Hefei, Peoples R China 3.Chinese Acad Sci, HFIPS, Inst Plasma Phys, Hefei, Peoples R China 4.Tongling Univ, Sch Elect Engn, Tongling, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jinlong,Guo, Jinmin,He, Bingling,et al. Diffusion and incidence of helium on tungsten surface[J]. JOURNAL OF NUCLEAR MATERIALS,2023,586. |
| APA | Wang, Jinlong.,Guo, Jinmin.,He, Bingling.,Liu, Daping.,Pan, Xin-Dong.,...&Luo, Guang-Nan.(2023).Diffusion and incidence of helium on tungsten surface.JOURNAL OF NUCLEAR MATERIALS,586. |
| MLA | Wang, Jinlong,et al."Diffusion and incidence of helium on tungsten surface".JOURNAL OF NUCLEAR MATERIALS 586(2023). |
入库方式： OAI收割
来源：合肥物质科学研究院
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