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	2011/11
形態種別	論文
査読	査読あり
標題	Melt-layer ejection and material changes of three different tungsten materials under high heat-flux conditions in the tokamak edge plasma of TEXTOR
執筆形態	共著・編著（代表編著を除く）
掲載誌名	NUCLEAR FUSION
掲載区分	国外
出版社・発行元	INT ATOMIC ENERGY AGENCY
巻・号・頁	51(11)
国際共著	国際共著
著者・共著者	J. W. Coenen,V. Philipps,S. Brezinsek,G. Pintsuk,I. Uytdenhouwen,M. Wirtz,A. Kreter,K. Sugiyama,H. Kurishita,Y. Torikai,Y. Ueda,U. Samm
概要	The behaviour of tungsten (W) plasma-facing components (PFCs) has been investigated in the plasma edge of the TEXTOR tokamak to study melt-layer ejection, macroscopic tungsten erosion from the melt layer as well as the changes of material properties such as grain-size and abundance of voids or bubbles. The parallel heat flux at the radial position of the exposed tungsten tile in the plasma ranges around q(parallel to) similar to 45MWm(-2) causing samples to be exposed at an impact angle of 35 degrees to 20-30MW m(-2). Locally the temperature reached up to 6000 K, high levels of evaporation and boiling are causing significant erosion in the form of continuous fine spray or droplet ejection.
DOI	10.1088/0029-5515/51/11/113020
ISSN	0029-5515/1741-4326