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	1998/10
形態種別	論文
査読	査読あり
標題	Steady state wall pumping performance of pebble drop divertor
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	258(Pt.A),pp.745-749
著者・共著者	M Isobe,Y Ohtsuka,Y Ueda,M Nishikawa
概要	A pebble drop divertor concept is proposed for future fusion reactor. By using multi-layer coated pebbles, this system can be expected to provide the fuel gas pumping function. In this paper, the pumping performance of the pebble drop divertor is estimated. The transient behavior of hydrogen retained in the surface layer of pebbles in divertor irradiation is calculated using a mass balance equation of hydrogen atoms in the graphite surface. In this calculation, the incident hydrogen flux of 1 x 10(23) atoms/m(2) s (1.5 keV) and the heat flux of 35 MW/m(2), and the width of strike zone of 5 cm are assumed. Range distribution of 1.5 keV hydrogen and ion-induced detrapping cross-section is calculated by TRIM code.
DOI	10.1016/S0022-3115(98)00380-8
ISSN	0022-3115