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Theoretical analysis of energetic-ion-driven resistive interchange mode stabilization strategies using a Landau closure model
http://hdl.handle.net/10655/00012872
http://hdl.handle.net/10655/00012872f27f6f8a-b27a-418c-93a1-128013e33b08
名前 / ファイル | ライセンス | アクション |
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Nucl.Fusion60_pp046013 (1.7 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-12-28 | |||||
タイトル | ||||||
タイトル | Theoretical analysis of energetic-ion-driven resistive interchange mode stabilization strategies using a Landau closure model | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | stellarator | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | LHD | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | EIC | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | MHD | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | energetic particles | |||||
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 |
VARELA, Jacobo
× VARELA, Jacobo× OHDACHI, Satoshi× WATANABE, Kiyomasa× SPONG, Donald A.× Garcia, L.× SEKI, Ryosuke |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0002-6114-0539 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The aim of the present study is to perform a theoretical analysis of different strategies to stabilize energetic-ion-driven resistive interchange mode (EIC) in Large Helical Device (LHD) plasma. We use a reduced MHD for the thermal plasma coupled with a gyrofluid model for the energetic particles (EP) species. The hellically trapped EP component is introduced through a modification of the drift frequency to include their precessional drift. The stabilization trends of the 1/1 EIC observed experimentally with respect to the thermal plasma density and temperature are reproduced by the simulations, showing a reasonable agreement with the data. The LHD operation scenarios with stable 1/1 EIC are identified, leading to the stabilization of the 1/1 EIC if the thermal plasma density and temperature are above a given threshold. The 1/1 EIC are also stabilized if the rotational transform is modified in a way that the 1/1 rational surface is located further away than 0.9 times the normalized radius, or the magnetic shear in the plasma periphery is enhanced. Also, LHD discharges with large magnetic fields show a higher EIC destabilization threshold with respect to the thermal plasma density. If the perpendicular NBI deposition region is moved further inward than 0.875 times the normalized radius the 1/1 EIC are also stabilized. In addition, increasing the perpendicular NBI voltage such that the EP energy is higher than 30 keV stabilizes the 1/1 EIC. Moreover, deuterium plasmas show a higher stability threshold for the 1/1 EIC than hydrogen plasmas. The experimental data shows a larger time interval between EIC events as the power of the tangential NBI is increased providing that the perpendicular NBI power is at least 13 MW. This implies a stabilizing effect of the tangential NBI. | |||||
書誌情報 |
Nuclear Fusion 巻 60, 号 4, p. 046013, 発行日 2020-02-27 |
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出版者 | ||||||
出版者 | IOP Publishing | |||||
出版者 | ||||||
出版者 | International Atomic Energy Agency | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0029-5515 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00759871 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1088/1741-4326/ab7213 | |||||
権利 | ||||||
権利情報 | This is the Accepted Manuscript version of an article accepted for publication in Nuclear Fusion. 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 https://doi.org/10.1088/1741-4326/ab7213. | |||||
情報源 | ||||||
関連名称 | J. Varela et al 2020 Nucl. Fusion 60 046013 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1088/1741-4326/ab7213 | |||||
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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