ウエダ　ヨシオ   Ueda Yoshio   上田　良夫    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2015/08
形態種別	論文
査読	査読あり
標題	Systematic investigation of the formation behavior of helium bubbles in tungsten
執筆形態	共著・編著（代表編著を除く）
掲載誌名	JOURNAL OF NUCLEAR MATERIALS
掲載区分	国外
出版社・発行元	ELSEVIER SCIENCE BV
巻・号・頁	463,pp.333-336
国際共著	国際共著
著者・共著者	M. Miyamoto,S. Mikami,H. Nagashima,N. Iijima,D. Nishijima,R. P. Doerner,N. Yoshida,H. Watanabe,Y. Ueda,A. Sagara
概要	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.
DOI	10.1016/j.jnucmat.2014.10.098
ISSN	0022-3115/1873-4820