Effect of 800 keV argon ions pre-damage on the helium blister formation of tungsten exposed to 60 keV helium ions

被引：38
作者：
Chen, Zhe [1 ]
Han, Wenjia [1 ]
Yu, Jiangang [1 ]
Zhu, Kaigui [1 ]
机构：
[1] Beihang Univ, Dept Phys, Beijing 100191, Peoples R China
来源：
JOURNAL OF NUCLEAR MATERIALS | 2016年 / 472卷
基金：
中国国家自然科学基金;
关键词：
Plasma facing materials; Helium irradiation; TDS; Pre-damage; DEUTERIUM RETENTION; LOW-ENERGY; DISPLACEMENT DAMAGE; THERMAL-DESORPTION; HYDROGEN; IRRADIATION; ITER; MICROSTRUCTURE; REFLECTIVITY; ULTRAFINE;
D O I：
10.1016/j.jnucmat.2016.01.031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study aims to investigate the effect of Ar8+ ions pre-damage on the following He2+ irradiation behavior of polycrystalline tungsten. We compared the irradiation resistance performance against 60 keV He2+ ions of undamaged tungsten samples with that of pre-damaged samples which were preliminarily exposed to 800 keV Ar8+ ions at a fluence of 4 x 10(19) ions m(-2). The experimental results indicate that the helium blistering of tungsten could be effectively relieved by the Ar8+ ions pre-damage, while the retention of helium around low energy desorption sites in the pre-damaged tungsten was larger than that of the undamaged samples. A strong orientation dependence of blistering had been observed, with the blister occurred preferentially on the surface of grains with normal direction close to <111>. The Ar8+ ions irradiation-induced damage altered the morphology of helium bubbles in tungsten exposed to the following He2+ irradiation significantly. The intensity of helium release peaks at relatively low temperatures (<600 K) was enhanced due to Ar8+ ions pre-damage. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：110 / 117
页数：8
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