Indexed by:期刊论文
Date of Publication:2020-10-01
Journal:JOURNAL OF NUCLEAR MATERIALS
Included Journals:SCIE
Volume:539
ISSN No.:0022-3115
Key Words:Ion irradiations; W fuzz; D retention; Plasma-facing material
Abstract:The retention of hydrogen isotopes in W is one of the main limiting factors affecting the design and development of next-step fusion reactors, such as the international thermonuclear experimental reactor (ITER). Here, we report on D retention behavior under the steady-state He/D ion irradiations of polycrystalline W. We find that the D retention behavior in the W bulk is completely suppressed by the growth of high surface-to-volume W fuzz layer (1.1-4.0 mm thick) over the surface. Our analyses show that due to their frequent collisions in the W fuzz layer, the dose of D ions greatly decreases when they collide into the W bulk beneath the fuzz layer. The W fuzz layer with a high surface-to-volume ratio becomes an effective shield against the ion driven diffusion processes. (C) 2020 Elsevier B.V. All rights reserved.
Senior Engineer
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Date of Birth:1971-11-24
Alma Mater:Dalian University of Technology
Degree:Doctoral Degree
School/Department:School of Electrical Engineering
Discipline:Theory and New Technology of Electrical Engineering
Business Address:School of Electrical Engineering, Dalian University of Technology, No.2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, China
Contact Information:dpliu@dlut.edu.cn
Open time:..
The Last Update Time:..
