Systematic investigation of the formation behavior of helium bubbles in tungsten

被引：97

作者：

Miyamoto, M. ^{[1
]}

Mikami, S. ^{[1
]}

Nagashima, H. ^{[1
]}

Iijima, N. ^{[1
]}

Nishijima, D. ^{[2
]}

Doerner, R. P. ^{[2
]}

Yoshida, N. ^{[3
]}

Watanabe, H. ^{[3
]}

Ueda, Y. ^{[4
]}

Sagara, A. ^{[5
]}

机构：

[1] Shimane Univ, Dept Mat Sci, Matsue, Shimane 6908504, Japan

[2] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA

[3] Kyushu Univ, RIAM, Kasuga, Fukuoka 8168580, Japan

[4] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan

[5] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2015年 / 463卷

基金：

日本学术振兴会;

关键词：

PLASMA; IRRADIATION;

D O I：

10.1016/j.jnucmat.2014.10.098

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The formation of He bubbles in tungsten under exposure to a He plasma was systematically investigated using low energy (similar to 50 eV) He ions with a wide fluence range (similar to 10(23) to 10(26) m(-2)) in the linear divertor plasma simulator PISCES-A at several temperatures (523-973 K). TEM observations after thinning exposed W samples with FIB revealed that the layer thickness (>30 nm) of He bubbles largely exceeds the ion implantation range of a few nm. The size of He bubbles was found to increase with an increase in the sample temperature: it was around 10 nm at 973 K, while only small He bubbles of 1-2 nm were observed at <773 K. In addition, to obtain information on the initial formation behavior, in-situ TEM observations during He ion irradiation were also performed. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：333 / 336

页数：4

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