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EUV/VUV Spectroscopy for the Study of Carbon Impurity Transport in Hydrogen and Deuterium Plasmas in the Edge Stochastic Magnetic Field Layer of Large Helical Device
http://hdl.handle.net/10655/00013605
http://hdl.handle.net/10655/00013605a1eb932e-e614-404d-b18e-48711deeeb76
名前 / ファイル | ライセンス | アクション |
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13736_plasma (11.6 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2023-05-18 | |||||
タイトル | ||||||
タイトル | EUV/VUV Spectroscopy for the Study of Carbon Impurity Transport in Hydrogen and Deuterium Plasmas in the Edge Stochastic Magnetic Field Layer of Large Helical Device | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | space-resolved spectroscopy | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | extreme ultraviolet vacuum 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 | stochastic magnetic field | |||||
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, Tetsutarou
× OISHI, Tetsutarou× MORITA, Shigeru× KOBAYASHI, Masahiro× KAWAMURA, Gakushi× KAWAMOTO, Yasuko× KAWATE, Tomoko× MASUZAKI, Suguru× SUZUKI, Chihiro× 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 | The ergodic layer in the Large Helical Device (LHD) consists of stochastic magnetic fields exhibiting a three-dimensional structure that is intrinsically formed by helical coils. Spectroscopic diagnostics was employed in the extreme ultraviolet (EUV) and vacuum ultraviolet (VUV) wavelength ranges to investigate emission lines of carbon impurities in both hydrogen (H) and deuterium (D) plasmas, aiming to elucidate the impact of distinct bulk ions on impurity generation and transport in the edge plasmas of the LHD. The emission intensity of carbon CIII, CIV, CV, and CVI lines is significantly higher in the D plasma compared to the H plasma, indicating a greater sputtering rate of carbon materials in the D plasma, resulting in a higher quantity of carbon impurities originating from the divertor plates. A Doppler profile measurement of the second order of CIV line emission (1548.20 × 2 Å) was attempted using a 3 m normal-incidence VUV spectrometer in the edge plasma at a horizontally elongated plasma position. The flow velocity reaches its maximum value close to the outermost region of the ergodic layer, and the observed flow direction aligns with the friction force in the parallel momentum balance. The flow velocity increases with the electron density in H plasmas, suggesting that the friction force becomes more dominant in the force balance at higher density regimes. This leads to an increase in the impurity flow, which can contribute to the impurity screening. In contrast, the flow velocity in the D plasma is smaller than that in the H plasma. The difference in flow values between D and H plasmas, when the friction force term dominates in the momentum balance, could be attributed to the mass dependence of the thermal velocity of the bulk ions. | |||||
書誌情報 |
Plasma 巻 6, 号 2, p. 308-321, 発行日 2023-05-12 |
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書誌的事項 | ||||||
This article belongs to the Special Issue Feature Papers in Plasma Sciences 2023 | ||||||
出版者 | ||||||
出版者 | MDPI | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2571-6182 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.3390/plasma6020021 | |||||
権利 | ||||||
権利情報 | © 2023 by the authors. | |||||
権利 | ||||||
権利情報 | Licensee MDPI, Basel, Switzerland. | |||||
情報源 | ||||||
関連名称 | Plasma 2023, 6(2), 308-321; https://doi.org/10.3390/plasma6020021 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.3390/plasma6020021 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
NAIS | ||||||
13736 |