The Accumulation of He on a W Surface During keV-He Irradiation: Cluster Dynamics Modeling

被引：6

作者：

Li Yonggang ^{[1
]}

Zhou Wanghai ^{[1
]}

Huang Liangfeng ^{[1
]}

Ning Ronghui ^{[1
]}

Zheng Zhi ^{[1
]}

Ju Xin ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China

来源：

PLASMA SCIENCE & TECHNOLOGY | 2012年 / 14卷 / 07期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

cluster dynamics model; rate theory; helium in tungsten; accumulation and diffusion; HELIUM ION IRRADIATION; LHD DIVERTOR PLASMAS; LOW-ENERGY; POINT-DEFECTS; TUNGSTEN; MICROSTRUCTURE; SIMULATION; RETENTION; EVOLUTION; PARTICLES;

D O I：

10.1088/1009-0630/14/7/13

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The accumulation of He on a W surface during keV-He ion irradiation has been simulated using cluster dynamics modeling. This is based mainly on rate theory and improved by involving different types of objects, adopting up-to-date parameters and complex reaction processes, as well as considering the diffusion process along with depth. These new features make the simulated results compare very well with the experimental ones. The accumulation and diffusion processes are analyzed, and the depth and size dependence of the He concentrations contributed by different types of He clusters is also discussed. The exploration of the trapping and diffusion effects of the He atoms is helpful in understanding the evolution of the damages in the near-surface of plasma-facing materials under He ion irradiation.

引用

页码：624 / 628

页数：5

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