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  1. 原著論文

Impurity Powder Injection Experiments in the Large Helical Device

https://repo.qst.go.jp/records/2002668
https://repo.qst.go.jp/records/2002668
4d259373-fd14-4b4f-bf8c-d3e841ea539f
アイテムタイプ 学術雑誌論文 / Journal Article(1)
公開日 2026-02-02
タイトル
タイトル Impurity Powder Injection Experiments in the Large Helical Device
言語 en
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 F. Nespoli

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F. Nespoli

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S. Masuzaki

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S. Masuzaki

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K. Tanaka

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K. Tanaka

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M. Shoji

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M. Shoji

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R. Lunsford

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R. Lunsford

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N. Ashikawa

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N. Ashikawa

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E. P. Gilson

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E. P. Gilson

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N. Tamura

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N. Tamura

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D. Medina-Roque

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D. Medina-Roque

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Kawate Tomoko

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Kawate Tomoko

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T. Oishi

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T. Oishi

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K. Ida

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K. Ida

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M. Yoshinuma

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M. Yoshinuma

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Y. Takemura

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Y. Takemura

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T. Kinoshita

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T. Kinoshita

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G. Motojima

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G. Motojima

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M. Osakabe

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M. Osakabe

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N. Kenmochi

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N. Kenmochi

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Kawamura Gakushi

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Kawamura Gakushi

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T. Singh

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T. Singh

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H. Takahashi

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H. Takahashi

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K. Ogawa

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K. Ogawa

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C. Suzuki

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C. Suzuki

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A. Nagy

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A. Nagy

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A. Bortolon

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A. Bortolon

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N. A. Pablant

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N. A. Pablant

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A. Mollen

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A. Mollen

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D. A. Gates

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T. Morisaki

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T. Morisaki

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抄録
内容記述タイプ Abstract
内容記述 The Impurity Powder Dropper (IPD) is a device capable of injecting controlled amounts of sub-millimetre powder into the plasma under the action of gravity. In 2019 the IPD was first installed on the Large Helical Device (LHD) in Japan, with the aim of improving the plasma performances through real time boronization and assessing the compatibility of this technique with steady state operation. Extensive series of experiments have been performed using the IPD, focused on the improvement of the plasma performance via low-Z powder injection and the understanding of the underlying physical phenomena. In this article, we review the experiments that took place in the period 2019-2024. The main results include the demonstration of the improvement of the wall conditions (reduction of intrinsic impurity content, wall recycling) both on a shot-to-shot basis and in real time. Furthermore, a reduced-turbulence improved confinement regime has been observed coincident with powder injection, resulting in an increase of the plasma temperature of the order of 25%, with enhancements that can reach up to 50% for ion temperature.
書誌情報 Journal of Fusion Energy

巻 44, p. 58, 発行日 2025-11
出版者
出版者 Springer Nature
DOI
識別子タイプ DOI
関連識別子 10.1007/s10894-025-00535-x
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