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	1997
形態種別	論文
査読	査読あり
標題	Experimental studies of the link between production and penetration of impurity atoms into the plasma edge and the central impurity content in TEXTOR-94
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	241,pp.793-798
国際共著	国際共著
著者・共著者	B Unterberg,H Knauf,P Lindner,Philipps, V,A Pospieszczyk,D Rusbudlt,U Samm,B Schweer,M Rubel,T Tanabe,Y Ueda,P Wada
概要	Characteristic quantities for impurity release from limiters and the penetration of atoms into the plasma boundary have been determined by optical methods on the tokamak TEXTOR-94. The velocity distribution of neon atoms released from a tungsten limiter has been measured. A drastic increase of fast particles could be observed in comparison to the velocity distribution of neon released from-a carbon limiter under comparable conditions. As a result the penetration depth of neon increased by a factor of 1.7. The influence of local electron density and temperature near the limiter has been demonstrated for various species as He, C, Ne, Si and Mo comparing different central electron densities. Both penetration depth and neutral fueling efficiency decrease with increasing density. For high Z materials such as Mo prompt redeposition of singly ionized ions is found to be of major importance.
DOI	10.1016/S0022-3115(96)00608-3
ISSN	0022-3115/1873-4820
NAID	30002371588