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	Deuterium retention in tungsten exposed to mixed D plus N plasma at divertor relevant fluxes in Magnum-PSI
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.974-978
国際共著	国際共著
著者・共著者	H. T. Lee,G. De Temmerman,L. Gao,T. Schwarz-Selinger,G. Meisl,T. Hoeschen,Y. Ueda
概要	Nitrogen (N) has been proposed as an extrinsic impurity species in the divertor to reduce the local power load onto tungsten (W) plasma-facing components. Laboratory studies at low incident fluxes have indicated N increases deuterium (D) retention in tungsten. Here we show that W exposed to D + N Magnum-PSI plasmas under divertor relevant particle fluxes (similar to 10(24) D/m(2) s), also results in an increase in D retention by enhanced near surface trapping up to 1100 K due either to N or Mo impurities, and increased retention in the bulk at T > 700 K. These results demonstrate that N or Mo surface impurities have the potential to alter the tritium inventory in tungsten plasma-facing components under diverter relevant particle fluxes by affecting surface and bulk retention processes. (C) 2014 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jnucmat.2014.11.043
ISSN	0022-3115/1873-4820