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	2011/08
形態種別	論文
査読	査読あり
標題	Exposure of tungsten nano-structure to TEXTOR edge plasma
執筆形態	共著・編著（代表編著を除く）
掲載誌名	JOURNAL OF NUCLEAR MATERIALS
出版社・発行元	ELSEVIER SCIENCE BV
巻・号・頁	415(1),pp.S92-S95
担当区分	筆頭著者
国際共著	国際共著
著者・共著者	Y. Ueda,K. Miyata,Y. Ohtsuka,H. T. Lee,M. Fukumoto,S. Brezinsek,J. W. Coenen,A. Kreter,A. Litnovsky,V. Philipps,B. Schweer,G. Sergienko,T. Hirai,A. Taguchi,Y. Torikai,K. Sugiyama,T. Tanabe,S. Kajita,N. Ohno
概要	W nano-structures (fuzz), produced in the linear high plasma device, NAGDIS, were exposed to TEXTOR edge plasmas (ohmic He/D mixed plasma and pure D plasma) to study formation, erosion and C deposition on W fuzz in tokamak plasmas for the first time. Fuzz layers were either completely eroded or covered by C deposit. There was no clear indication of W fuzz growth under the present conditions. There was no significant difference of C deposition between 'thick' fuzz (500-600 nm in thickness) and 'thin' fuzz (300-400 nm) in the He/D plasma. On the W fuzz surface. C deposition was enhanced probably due to reduction of effective sputtering yield and effective reflection coefficient of carbon ions, similar to roughness effects. Formation and erosion of W fuzz in tokamak devices and role of impurities are discussed. (C) 2010 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jnucmat.2010.08.019
ISSN	0022-3115/1873-4820