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Qualitative Improvement of Zeff Diagnostic Based on Visible Bremsstrahlung Profile Measurement by Changing Observation Cross Section in LHD
http://hdl.handle.net/10655/00013039
http://hdl.handle.net/10655/0001303935abb27a-0b05-4a3a-8a18-39700c685e5e
名前 / ファイル | ライセンス | アクション |
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pfr2021_16-2402072 (750.6 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-02-17 | |||||
タイトル | ||||||
タイトル | Qualitative Improvement of Zeff Diagnostic Based on Visible Bremsstrahlung Profile Measurement by Changing Observation Cross Section in LHD | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | effective ion charge | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | bremsstrahlung | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | visible spectrometer | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Large Helical Device | |||||
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 |
KAWAMOTO, Yasuko
× KAWAMOTO, Yasuko× MORITA, Shigeru× GOTO, Motoshi× OISHI, Tetsutarou |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0002-6337-4080 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Full vertical profiles of visible bremsstrahlung continuum have been measured for diagnostics of effective ion charge, Zeff , with parallel optical fiber arrays at horizontally elongated plasma cross section in the Large Helical Device (LHD). Measured bremsstrahlung profiles were asymmetric due to non-uniform bremsstrahlung emissions located in the stochastic magnetic field layer. Then, the Zeff profile analysis has been done only for a magnetic configuration with relatively thin stochastic magnetic field layer, i.e. for plasmas at magnetic axis position of Rax = 3.60 m. The effect of the non-uniform bremsstrahlung emission disappears in the lower half profile at Rax = 3.60 m, while the Zeff profile analysis is extremely difficult in other magnetic configurations due to the presence of the non-uniform bremsstrahlung emission over the entire vertical profile from top to bottom. To improve the difficult situation in the Zeff diagnostic the fan array optical fiber system was newly installed at vertically elongated plasma cross section for full horizontal profile measurement. It is found that the non-uniform bremsstrahlung emissions disappear from the signal and the observed bremsstrahlung profile is almost symmetric between inboard and outboard radial profiles. The analysis on the Zeff profile has been carried out based on the plasma equilibrium database in LHD, TSMAP. A preliminary result is obtained in high-density discharges, which shows a flat Zeff profile and values of Zeff ∼ 1. | |||||
書誌情報 |
Plasma and Fusion Research 巻 16, 号 Special Issue 1, p. 2402072, 発行日 2021-06-07 |
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書誌的事項 | ||||||
the 29th International Toki Conference on Plasma and Fusion Research (ITC29) | ||||||
出版者 | ||||||
出版者 | The Japan Society of Plasma Science and Nuclear Fusion Research | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1880-6821 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12346675 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1585/pfr.16.2402072 | |||||
権利 | ||||||
権利情報 | (c) 2021 The Japan Society of Plasma Science and Nuclear Fusion Research | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1585/pfr.16.2402072 | |||||
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 | ||||||
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