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Study of Alfven eigenmodes stability in plasma with multiple NBI driven energetic particle species
http://hdl.handle.net/10655/00012871
http://hdl.handle.net/10655/000128718709d381-c466-4264-89da-78155fae9aae
名前 / ファイル | ライセンス | アクション |
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Phys.Plasmas26_pp062502 (4.8 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 | Study of Alfven eigenmodes stability in plasma with multiple NBI driven energetic particle species | |||||
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 | |||||
著者 |
VARELA, Jacobo
× VARELA, Jacobo× SPONG, Donald A.× GARCIA, Luis× TODO, Yasushi× HUANG, J.× MURAKAMI, M. |
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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 this study is to analyze the destabilization of Alfven Eigenmodes (AEs) by multiple energetic particle (EP) species in DIII-D and LHD discharges. We use the reduced MHD equations to describe the linear evolution of the poloidal flux and the toroidal component of the vorticity in a full 3D system, coupled with equations of density and parallel velocity moments for the energetic particle species, including the effect of the acoustic modes, diamagnetic currents, and helical couplings. We add the Landau damping and resonant destabilization effects using a closure relation. The simulations with multiple neutral beam injector (NBI) lines show three different regimes: the nondamped regime where the multibeam AE growth rate is larger compared to the growth rate of the AEs destabilized by the individual NBI lines, the interaction regime where the multibeam AE growth rate is smaller than the single NBI AEs, and the damped regime where the AEs are suppressed. Operations in the damped regime require EP species with different density profile flatness or gradient locations. In addition, the AE growth rate in the interaction regime is further reduced if the combined NBI lines have similar beam temperatures and the β of the NBI line with a flatter EP density profile increases. Then, optimization trends are identified in DIII-D high poloidal β and LHD low density/magnetic field discharges with multiple NBI lines as well as the configuration requirements to operate in the damped and interaction regimes. DIII-D simulations show a decrease in the n = 2 to 6 AE growth rate and n = 1 AE are stabilized in the LHD case. The helical coupling effects in LHD simulations lead to a transition from the interaction to the damped regime of the n = 2, –8, 12 helical family. | |||||
書誌情報 |
Physics of Plasmas 巻 26, 号 6, p. 062502, 発行日 2019-06-04 |
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出版者 | ||||||
出版者 | AIP Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1070664X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10987555 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://aip.scitation.org/doi/abs/10.1063/1.5098347 | |||||
権利 | ||||||
権利情報 | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Physics of Plasmas 26, 062502 (2019); and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5098347. | |||||
情報源 | ||||||
関連名称 | Physics of Plasmas 26, 062502 (2019); https://doi.org/10.1063/1.5098347 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1063/1.5098347 | |||||
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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