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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/10655/00013567
639a2f04-d979-4b67-a260-0355f8e4feb2
名前 / ファイル ライセンス アクション
Nature.Phys_18_350–356.pdf Nature.Phys_18_350–356 (3.5 MB)
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Item type 学術雑誌論文 / Journal Article(1)
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

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NESPOLI, Federico

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MASUZAKI, Suguru

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MASUZAKI, Suguru

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TANAKA, Kenji

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TANAKA, Kenji

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ASHIKAWA, Naoko

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ASHIKAWA, Naoko

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SHOJI, Mamoru

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SHOJI, Mamoru

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GILSON, Eric

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GILSON, Eric

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LUNSFORD, Robert

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LUNSFORD, Robert

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OISHI, Tetsutarou

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OISHI, Tetsutarou
OISHI, Tetsutaro

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IDA, Katsumi

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IDA, Katsumi

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YOSHINUMA, Mikirou

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YOSHINUMA, Mikirou

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TAKEMURA, Yuki

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TAKEMURA, Yuki
TAKEMURA, Yuuki

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KINOSHITA, Toshiki

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KINOSHITA, Toshiki

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MOTOJIMA, Gen

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MOTOJIMA, Gen

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KENMOCHI, Naoki

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KENMOCHI, Naoki

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KAWAMURA, Gakushi

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KAWAMURA, Gakushi

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SUZUKI, Chihiro

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SUZUKI, Chihiro

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NAGY, Alex

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NAGY, Alex

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BORTOLON, A.

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BORTOLON, A.

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PABLANT, Novimir

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PABLANT, Novimir

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MOLLEN, Albert

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MOLLEN, Albert

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TAMURA, Naoki

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TAMURA, Naoki

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GATES, David

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GATES, David

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MORISAKI, Tomohiro

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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
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
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