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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 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2017/08/01 |
| 形態種別 | 論文 |
| 査読 | 査読あり |
| 標題 | Initial growth phase of W-fuzz formation in ultra-long pulse helium discharge in LHD |
| 執筆形態 | 共著・編著（代表編著を除く） |
| 掲載誌名 | Nuclear Materials and Energy |
| 掲載区分 | 国外 |
| 出版社・発行元 | Elsevier Ltd |
| 巻・号・頁 | 12,pp.1358-1362 |
| 著者・共著者 | M. Tokitani,LHD Experiment Group,S. Masuzaki,H. Kasahara,Y. Yoshimura,R. Sakamoto,N. Yoshida,Y. Ueda,T. Mutoh,S. Nagata |
| 概要 | In order to confirm the formation of a tungsten fiberform nanostructure (W-fuzz) by helium plasma exposure in the large-sized plasma confinement device, the bulk tungsten with the size of 80 × 20 × 1.5 mm3 was inserted into the divertor leg position in the Large Helical Device (LHD). Then, it was exposed to the divertor plasma during the ultra-long pulse helium discharges with 10,190 s in total. The width of the divertor plasma, incident ion energy and total fluence were expected to be ∼2 cm, 100–200 eV and ∼5 × 1025 He/m2 (strike position), respectively. The surface temperature of the tungsten specimen was monitored by IR camera. The typical surface temperature of the divertor strike point was estimated to be around 1900 ∼ 2300 K. After the exposure, an initial growth phase of tungsten fiberform nanostructure (W-fuzz) was able to be identified on the tungsten surface. |
| DOI | 10.1016/j.nme.2016.11.023 |
| ISSN | 2352-1791/2352-1791 |