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	2017/11/01
形態種別	論文
査読	査読あり
標題	Laser energy absorption coefficient and in-situ temperature measurement of laser-melted tungsten
執筆形態	共著・編著（代表編著を除く）
掲載誌名	Fusion Engineering and Design
掲載区分	国外
出版社・発行元	Elsevier Ltd
巻・号・頁	124,pp.287-291
著者・共著者	T. Maeji,K. Ibano,S. Yoshikawa,D. Inoue,S. Kuroyanagi,K. Mori,E. Hoashi,K. Yamanoi,N. Sarukura,Y. Ueda
概要	The energy absorption coefficient of tungsten surface (W) for 1064 nm Nd:YAG laser was measured as a function of the induced energy. Result was confirmed by the reference spectral emissivity up to the melting point. Then, two non-contact surface temperature measurement diagnostics, a pyrometer measurement and a two-dimensional (2D) temperature measurement, were constructed for the laser-melted W spot. The 2D temperature profile was obtained by analyzing two-color images from a high-speed camera with an image splitter and a long-distance microscope. An OpenCV based program was developed for corrections on the tilted angle view and wavelength dependence of the captured intensities. W surface bubbling at the surface temperature near 5000 K was indicated by high-speed camera images, unstable temperature developments, asymmetric temperature profiles, and the postmortem surface observations.
DOI	10.1016/j.fusengdes.2017.04.025
ISSN	0920-3796