He^(+)等离子体辐照下钨丝表面He通量分布的数值模拟  

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

作　　者：李晓萍 张映辉 LI Xiao-ping;ZHANG Ying-hui(School of Science,Dalian Maritime University,Dalian 116026)

机构地区：[1]大连海事大学理学院,大连116026

出　　处：《核聚变与等离子体物理》2023年第3期359-365,共7页Nuclear Fusion and Plasma Physics

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。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.

关 键 词：钨纳米丝 碰撞过程 钨丝表面He通量 碰撞数密度 

分 类 号：TG14[一般工业技术—材料科学与工程]