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	2020/12
形態種別	論文
査読	査読あり
標題	In-situ measurement of surface modifications of tungsten exposed to pulsed high heat flux for divertor design in tokamak-type fusion nuclear reactors
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
巻・号・頁	161
著者・共著者	Yuki Matsuda,Shohei Yamashita,Yusei Miyamoto,Daichi Motoi,Takafumi Okita,Eiji Hoashi,Kenzo Ibano,Yoshio Ueda
概要	In this paper, the two measurement methods are shown; the in-situ observation of the W surface modification by a High Speed Video (HSV) camera and 3-Dimensional (3D) measurement of melting W surface by stereoscopic photography technique (SPT). In the former, the detailed process of W melting was clarified by observing W surface modification and analyzing luminance at the center of laser-irradiated spot. It was confirmed that luminescence at the center area of heat load fluctuated violently due to the phase change of W. In the latter, 3D images of W surface shape during melting was obtained using SPT and the results indicated that the W surface fluctuated in melting and gathered to the center gradually in solidifying. The calibration accuracy was still scope for improvement but the 3D measurement of W surface behavior loaded by high heat flux was established successfully.
DOI	10.1016/j.fusengdes.2020.112042
ISSN	0920-3796