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Observation of line emissions from Ni-like W46 + ions in wavelength range of 7–8 Å in the Large Helical Device
http://hdl.handle.net/10655/00012810
http://hdl.handle.net/10655/00012810970306f0-cbf5-4b06-808d-e9510dfa4166
名前 / ファイル | ライセンス | アクション |
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Phys.Scr_96_ 025602 (1.6 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-12-21 | |||||
タイトル | ||||||
タイトル | Observation of line emissions from Ni-like W46 + ions in wavelength range of 7–8 Å in the Large Helical Device | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | plasma spectroscopy | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | extreme ultraviolet | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | magnetically confined fusion | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | impurity transport | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | highly ionized tungsten ions | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | forbidden transition | |||||
キーワード | ||||||
主題Scheme | Other | |||||
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 | |||||
著者 |
OISHI, Tetsutaro
× OISHI, Tetsutaro× MORITA, Shigeru× KATO, Daiji× MURAKAMI, Izumi× SAKAUE, Hiroyuki A.× KAWAMOTO, Yasuko× GOTO, Motoshi |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0002-1171-8603 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Tungsten W46+ lines were successfully observed in the extreme ultraviolet (EUV) wavelength range of 7 ∼ 8 Å in the Large Helical Device (LHD). Tungsten ions are distributed in the neutral beam injection (NBI) heated LHD plasma by injecting a pellet consisting of a small piece of tungsten metal wire enclosed by a carbon tube. While the electron temperature has a sudden drop due to the pellet injection, it can be recovered by applying electron cyclotron heating (ECH) together with continuous NBI heating. It is found that a W46+ line at 7.93 Å is emitted when the central electron temperature ranges around 3.4 keV with relatively high intensity and is isolated from other intrinsic impurity lines. The 7.93 Å line consists of two lines of forbidden transitions which are blended with each other; an electric quadrupole (E2) transition at 7.928 Å and a magnetic octupole (M3) transition at 7.938 Å. Observation of W46+ lines in the stellarator experiments is reported for the first time in the present study while the lines have been already observed in several tokamak experiments. The electron temperature dependence of the emission intensity of the 7.93 Å line agreed well with that of the fractional abundance of W46+ ions calculated using the ionization and recombination rate coefficients available in the ADAS database under the assumption of the collisional ionization equilibrium. The 7.93 Å line observed in this study will be used as tools for further spectroscopic researches, such as the measurements of spatial profile of W46+ ions using a space-resolved EUV spectrometer developed in LHD. | |||||
書誌情報 |
Physica Scripta 巻 96, 号 2, p. 025602, 発行日 2020-02-14 |
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出版者 | ||||||
出版者 | IOP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00318949 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00773442 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1088/1402-4896/abd0ba | |||||
権利 | ||||||
権利情報 | This is the Accepted Manuscript version of an article accepted for publication in Physica Scripta. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi.org/10.1088/1402-4896/abd0ba. | |||||
情報源 | ||||||
関連名称 | Citation Tetsutarou Oishi et al 2021 Phys. Scr. 96 025602 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/1402-4896/abd0ba | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
NAIS | ||||||
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