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	Tungsten melt layer motion and splashing on castellated tungsten surfaces at the tokamak TEXTOR
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	415(1),pp.S78-S82
国際共著	国際共著
著者・共著者	J. W. Coenen,B. Bazylev,S. Brezinsek,V. Philipps,T. Hirai,A. Kreter,J. Linke,G. Sergienko,A. Pospieszczyk,T. Tanabe,Y. Ueda,U. Samm
概要	Dedicated melt experiments of castellated tungsten (W) surfaces under high heat-loads were carried out in TEXTOR. Several 2 mm thick tungsten plates were used in single and multiple exposure to steady state heat loads of similar to 20 MW/m(2) up to 70 MW/m(2). The evolution of the melt layer, its motion under tokamak conditions as well as melt ejection are shown. The motion is dominated by the Lorentz-force, driven via the thermionic emission current of the heated W-plate and the toroidal magnetic field while plasma pressure can be neglected under TEXTOR conditions. In theses experiments no significant material losses are observed (<100 mu g), while melt layer ejection in form of mm sized droplets is evident. The castellated structure can hinder the motion of thin melt while thick layers and multiple exposures lead to filling of gaps. Power-handling capabilities are significantly influenced by the changes in surface topology. (C) 2010 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jnucmat.2010.09.046
ISSN	0022-3115