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	2013
形態種別	論文
査読	査読あり
標題	Influence of Be seeding on microstructures of tungsten exposed to D–He mixture plasmas in PISCES and its impacts on retention properties
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
巻・号・頁	438(SUPPL),pp.S216-S219
国際共著	国際共著
著者・共著者	Mitsutaka Miyamoto,Daisuke Nishijima,Matthew Baldwin,Russ Doerner,Yoshio Ueda,Akio Sagara
概要	Microstructural changes and their impacts on D retention properties in tungsten (W) are investigated due to mixed species D-Be-He plasma exposure. Be seeding to D + He mixture plasmas results in the suppression of high density He nano-bubbles, which are distinctive internal defects observed in He irradiated/exposed metals. In contrast, cavities appear in the near surface of W exposed to D + Be plasmas, when a thick Be deposition layer forms. Since bubbles are not generally observed in W exposed to D plasma, the cavities seem to be deuterium bubbles formed in the deposited Be layer. While D retention significantly decreases in W exposed to D + He plasma without Be, Be seeding to D + He mixture plasmas obstructs this He seeding effect. As a consequence, it is considered that Be seeding has a more dominant influence on microstructures and D retention in plasma-exposed W than He seeding. © 2013 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jnucmat.2013.01.030
ISSN	0022-3115