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アイテム
Ignition and Sustainment of Arcing on Nanostructured Tungsten Under Plasma Exposure
http://hdl.handle.net/2237/00030893
http://hdl.handle.net/2237/00030893903f65bd-edfc-443d-a1a8-b5261b489e27
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
IEEETPS_dogyun_final_compressed (1.5 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-11-15 | |||||
| タイトル | ||||||
| タイトル | Ignition and Sustainment of Arcing on Nanostructured Tungsten Under Plasma Exposure | |||||
| 言語 | en | |||||
| 著者 |
Hwangbo, Dogyun
× Hwangbo, Dogyun× Nishijima, Daisuke× Kajita, Shin× Doerner, Russell P.× Barengolts, Sergey A.× Tsventoukh, Mikhail M.× Tanaka, Hirohiko× Ohno, Noriyasu |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | “© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.” | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | tungsten | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | divertor | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | nanostructure | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | unipolar arcing | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | nuclear fusion | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Laser-induced arc was initiated on a nanostructured “fuzz” tungsten cathode with simultaneous exposure to a stationary helium (He) plasma. Arc spots moved randomly and eroded almost all the surface area. The diameter of each arc spot was measured to be 5-10 μm. A linear relationship was observed in the arc current-voltage characteristic, which was affected by the presence of resistance through a He plasma column. The specific resistance of He plasmas was estimated from the current-voltage characteristic, which showed a good agreement with theoretical calculations. A greater potential gap should be maintained to keep a higher arc current, indicating a good sign for preventing a high-current arc in fusion devices. The condition of arc ignition was investigated in detail by changing the He plasma parameters and the sheath potential drop. The ignition and sustainment of arcs were very sensitive to both the sheath potential drop and the sheath electric field. Arcs ignited when the sheath potential drop was negatively deeper than -100 V and the sheath electric field was above 2 MV/m. The relatively low electric field threshold would result from the thermofield emission aided by heating of spots from adjacent former spots. This result indicates that the electron density and the electron temperature should be reduced in order to lower the potential drop and the sheath electric field in front of the plasma-facing material surface, which can prevent arcs from igniting in fusion devices. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | IEEE | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1109/TPS.2019.2910839 | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0093-3813 | |||||
| 書誌情報 |
en : IEEE Transactions on Plasma Science 巻 47, 号 8, p. 3617-3625, 発行日 2019-04-24 |
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| 著者版フラグ | ||||||
| 値 | author | |||||
