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	2011/10
形態種別	論文
査読	査読あり
標題	Effects of repeated short heat pulses on tungsten
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	417(1-3),pp.487-490
著者・共著者	H. Kurehashi,Y. Ohtsuka,Y. Ueda,H. Kurishita
概要	Effects of ELM-like repeated short heat pulses on tungsten have been studied by using a fundamental wave (wave length of 1064 nm, the pulse length of 130 mu s) of a Nd/YAG laser. Tungsten temperature was 773 K or 473 K. The energy absorption rate of the laser light was about 30% for mirror-finished surface. After 10,000 shots at an incident energy fluence of 7 J/cm(2) (melting threshold was about 150 J/cm(2)), the cracks formation was still observed. Surface roughening and cracking were more pronounced for tungsten samples with surface impurity mixing layers (carbon and oxygen). (C) 2010 Elsevier B.V. All rights reserved.
DOI	10.1016/j.jnucmat.2010.12.123
ISSN	0022-3115