Deuterium retention in heavy-ion and helium-ion sequentially irradiated tungsten

被引：3

作者：

Zhang, Hong ^{[1
,2
,3
]}

Zhang, Xuexi ^{[1
]}

Li, Yuhong ^{[2
]}

Wang, Peng ^{[1
]}

Qiao, Li ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

[2] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

NUCLEAR FUSION | 2024年 / 64卷 / 02期

基金：

中国国家自然科学基金;

关键词：

tungsten; heavy ion; helium; synergistic irradiation; deuterium retention; MICROSTRUCTURE; DAMAGE;

D O I：

10.1088/1741-4326/ad1789

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：

Neutron irradiation as well as the presence of helium (He) significantly affects fuel inventory in plasma-facing materials. To investigate the synergistic effects of neutron and He irradiation on deuterium (D) retention behaviors in tungsten, heavy- and He-ion sequentially irradiation experiments were performed with various He fluence and/or heavy-ion damage levels, and then the samples were exposed to low-energy D plasmas at 450 K. It is shown that even a low He concentration of 0.5 atomic parts per million (appm) increases D concentration in the heavy-ion damaged region, which increases further with increasing He concentration under the parameters selected in this work (up to a maximum He concentration of 2.1 appm). The total D inventory in tungsten bulk also increases with He fluence due to the increase in D concentration both in the heavy-ion damaged region and the region irradiated by He-ion only. Furthermore, heavy-ion and He-ion successive irradiation slightly increases D retention in tungsten compared to the individual He ions irradiation. Similar to single heavy-ion damaged tungsten, the saturation of D retention is observed as heavy-ion irradiation damage above 0.2 dpa at a fixed He fluence.

引用

页数：11

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