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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 | 2013/05/01 |
| 形態種別 | 論文 |
| 査読 | 査読あり |
| 標題 | Impact of arcing on carbon and tungsten: From the observations in JT-60U, LHD and NAGDIS-II |
| 執筆形態 | 共著・編著（代表編著を除く） |
| 掲載誌名 | Nuclear Fusion |
| 掲載区分 | 国外 |
| 出版社・発行元 | IOP PUBLISHING LTD |
| 巻・号・頁 | 53(5) |
| 著者・共著者 | Shin Kajita,Masakatsu Fukumoto,Masayuki Tokitani,Tomohide Nakano,Yasuyuki Noiri,Noriyasu Ohno,Suguru Masuzaki,Shuichi Takamura,Naoaki Yoshida,Yoshio Ueda |
| 概要 | Arcing is a long-standing plasma-surface interaction issue, and the issue is currently being revived. This paper assesses the impact of arcing in fusion devices based on the observations in JT-60U, the Large Helical Device (LHD) and the linear divertor simulator NAGDIS-II. To investigate the first initiation process of arcing, field emission currents from several tungsten samples are measured. It is shown that the field emission current increases significantly after tungsten is exposed to helium plasmas. A postmortem analysis of JT-60U tiles reveals that arcing phenomena occurred on carbon baffle plates inside the vacuum vessel in JT-60U. From the observation of the arc trails recorded on the baffle plate, the amount of eroded materials is discussed. The arcing seems to occur frequently on the inner baffles rather than the outer baffles. From LHD, it is shown that the arcing can be initiated on nanostructured tungsten even without transient events. |
| DOI | 10.1088/0029-5515/53/5/053013 |
| ISSN | 0029-5515/1741-4326 |
| PermalinkURL | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84876820237&origin=inward |