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	2009/06
形態種別	論文
査読	査読あり
標題	Localized tungsten deposition in divertor region in JT-60U
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	49(6)
担当区分	筆頭著者
著者・共著者	Y. Ueda,M. Fukumoto,J. Watanabe,Y. Ohtsuka,T. Arai,N. Asakura,Y. Nobuta,M. Sato,T. Nakano,J. Yagyu,K. Ochiai,K. Takakura,T. Tanabe
概要	Tungsten local transport in the diverter region emitted from the outer divertor was studied in JT-60U. Tungsten-coated CFC tiles were installed in the outer divertor position, on which outer strike points did not normally sit. A neutron activation method to measure tungsten surface density was used for the first time. On the outer wing tile, W existed only in the top surface, while on the inner divertor tile W was embedded in the thick carbon deposition layer. Poloidal distribution in the same toroidal section as the tungsten tiles showed dense W deposition near the inner strike points, the dome top and outer wing of the dome. Carbon ions by puffing (13)CH(4) at the same toroidal position of the W-tiles were also deposited near the inner strike points. Toroidal distribution on the outer wing showed significant localization of W deposition near the W tile array. In addition, toroidal asymmetry of W deposition on the outer wing probably due to the plasma parallel flow was observed.
DOI	10.1088/0029-5515/49/6/065027
ISSN	0029-5515/1741-4326