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Nuclear Fusion and Plasma Physics ›› 2023, Vol. 43 ›› Issue (3): 359-365.DOI: 10.16568/j.0254-6086.202303017

• Plasma Physics • Previous Articles     Next Articles

Numerical simulation of the distribution of He flux on the W fuzz surface under He+ plasma irradiation

LI Xiao-ping, ZHANG Ying-hui    

  1. (School of Science, Dalian Maritime University, Dalian 116026) 
  • Received:2021-10-29 Revised:2023-04-09 Online:2023-09-15 Published:2023-09-11

He+ 等离子体辐照下钨丝表面 He 通量分布的数值模拟

李晓萍,张映辉*    

  1. (大连海事大学理学院,大连 116026) 
  • 作者简介:李晓萍(1997−),女,山西吕梁人,硕士,从事等离子体与材料相互作用研究。

Abstract: Under fusion-related He plasma irradiation conditions, the formation of nanostructured W fuzz has significant effect on the radiation resistance of the materials and the distribution of He in the W fuzz layer. The model of He flux distribution on the W fuzz surface under He+ irradiated is established according to the collision process of He ions in W fuzz layer. The results show that the He flux on the W fuzz surface decreases with the increase of the depth. At the depth of 3.3μm, the He flux on the W fuzz surface is one hundredth of that on the surface layer. In addition, the He flux on the W fuzz surface increases linearly with the increase of injected ion flux, but it has little relationship with the ion energy. The He flux on the W fuzz surface decreases significantly with the increase of the thickness of the W fuzz layer. The He flux on the W fuzz layer surface will increase obviously with the increase of the radius of the W fuzz. 

Key words: Nanostructured W fuzz, Collision process, He flux on the W fuzz surface, Collision density

摘要: 在 He 等离子体辐照条件下,钨纳米丝的形成对材料的抗辐照性能及钨丝间隙内 He 的分布产生显著影响。根据钨丝层中 He 离子的碰撞过程,建立了 He+ 辐照下钨纳米丝表面 He 通量分布的模型。研究表明钨丝表面 He 通量随着深度的增大而减小,在深度 3.3μm 处,钨丝表面 He 通量是表层的百分之一。钨丝表面 He 通量随着注入离子通量的增加呈线性增长,但是与注入离子的能量几乎无关。钨丝层厚度越大,钨丝表面 He 通量越小;随着钨丝半径的增大,钨丝表层的 He 通量会明显增大。

关键词: 钨纳米丝, 碰撞过程, 钨丝表面 He 通量, 碰撞数密度

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