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	2009/07
形態種別	論文
査読	査読あり
標題	EFFECTS OF HELIUM IONS ON HYDROGEN ISOTOPE BEHAVIOR IN TUNGSTEN
執筆形態	共著・編著（代表編著を除く）
掲載誌名	FUSION SCIENCE AND TECHNOLOGY
掲載区分	国外
出版社・発行元	AMER NUCLEAR SOC
巻・号・頁	56(1),pp.85-90
担当区分	筆頭著者
著者・共著者	Y. Ueda,H. Kashiwagi,M. Fukumoto,Y. Ohtsuka,N. Yoshida
概要	Simultaneous irradiation effects of He on tungsten blistering with hydrogen and carbon mixed ion beam were investigated. It was found that only 0.1% addition of He ions to 1 keV H and C mixed ion beam (C:0.8-1.0%) reduced (at 473 K) or completely suppressed (at 653 K and 723 K) blister formation. In order to obtain more detailed result, two ion sources were used to irradiate tungsten with H and He ions with different energies. In the He energy of 0.6 keV (1.5 keV H&C), significant blistering was observed, while in the He energies of 1.0 keV and 1.5 keV, blister formation was suppressed. These results suggested that a He bubble layer reduced hydrogen diffusion through the layer. A He bubble size and a volume rate were about 1-2 nm and similar to 2% at 653 K, respectively. To evaluate T retention in the ITER tungsten wall, this effect should be included.
DOI	10.13182/FST09-A8881
ISSN	1536-1055/1943-7641