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	2015/08
形態種別	論文
査読	査読あり
標題	Plasma wall interaction in long-pulse helium discharge in LHD - Microscopic modification of the wall surface and its impact on particle balance and impurity generation
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	463,pp.91-98
著者・共著者	M. Tokitani,H. Kasahara,S. Masuzaki,G. Motojima,M. Shoji,Y. Ueda,N. Yoshida,Y. Yoshimura,K. Nagasaki,N. Ashikawa,T. Mutoh,H. Yamada,S. Nagata
概要	Ultra-long-pulse helium discharge with ion and electron cyclotron heating (ICH + ECH) in the Large Helical Device (LHD) was achieved in a 48 min plasma (n(e) similar to 1.2 x 10(19) m(-3), T-i,T-e similar to 2 keV) with an average heating power of 1.2 MW. The temperature of the first-wall surface during discharges remained at nearly room temperature. However, even in ultra-long-pulse helium discharge, the discharge conditions cannot be said to be in a steady-state, because of two major issues interrupting the steady-state condition. One is the "dynamic change of the wall pumping rate" and the other is the "termination of the discharge with the exfoliation of the mixed-material deposition layers."
DOI	10.1016/j.jnucmat.2014.12.062
ISSN	0022-3115/1873-4820