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Observation of a reduced-turbulence regime with boron powder injection in a stellarator
http://hdl.handle.net/10655/00013567
http://hdl.handle.net/10655/00013567639a2f04-d979-4b67-a260-0355f8e4feb2
名前 / ファイル | ライセンス | アクション |
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Nature.Phys_18_350–356 (3.5 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2023-03-06 | |||||
タイトル | ||||||
タイトル | Observation of a reduced-turbulence regime with boron powder injection in a stellarator | |||||
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 |
NESPOLI, Federico
× NESPOLI, Federico× MASUZAKI, Suguru× TANAKA, Kenji× ASHIKAWA, Naoko× SHOJI, Mamoru× GILSON, Eric× LUNSFORD, Robert× OISHI, Tetsutarou× IDA, Katsumi× YOSHINUMA, Mikirou× TAKEMURA, Yuki× KINOSHITA, Toshiki× MOTOJIMA, Gen× KENMOCHI, Naoki× KAWAMURA, Gakushi× SUZUKI, Chihiro× NAGY, Alex× BORTOLON, A.× PABLANT, Novimir× MOLLEN, Albert× TAMURA, Naoki× GATES, David× MORISAKI, Tomohiro |
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著者ID | ||||||
内容記述タイプ | Other | |||||
内容記述 | 0000-0001-7644-751X | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In state-of-the-art stellarators, turbulence is a major cause of the degradation of plasma confinement. To maximize confinement, which eventually determines the amount of nuclear fusion reactions, turbulent transport needs to be reduced. Here we report the observation of a confinement regime in a stellarator plasma that is characterized by increased confinement and reduced turbulent fluctuations. The transition to this regime is driven by the injection of submillimetric boron powder grains into the plasma. With the line-averaged electron density being kept constant, we observe a substantial increase of stored energy and electron and ion temperatures. At the same time, the amplitude of the plasma turbulent fluctuations is halved. While lower frequency fluctuations are damped, higher frequency modes in the range between 100 and 200 kHz are excited. We have observed this regime for different heating schemes, namely with both electron and ion cyclotron resonant radio frequencies and neutral beams, for both directions of the magnetic field and both hydrogen and deuterium plasmas. | |||||
書誌情報 |
Nature Physics 巻 18, p. 350-356, 発行日 2022-01-10 |
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出版者 | ||||||
出版者 | Nature Research | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1745-2473 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11976000 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1038/s41567-021-01460-4 | |||||
権利 | ||||||
権利情報 | © 2022, The Author(s) | |||||
情報源 | ||||||
関連名称 | Nespoli, F., Masuzaki, S., Tanaka, K. et al. Observation of a reduced-turbulence regime with boron powder injection in a stellarator. Nat. Phys. 18, 350–356 (2022). https://doi.org/10.1038/s41567-021-01460-4 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1038/s41567-021-01460-4 | |||||
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 |