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  1. Published Papers
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Data-Driven Approach on the Mechanism of Radiative Collapse in the Large Helical Device

http://hdl.handle.net/10655/00013554
http://hdl.handle.net/10655/00013554
a5bd7834-0307-40f1-9d56-efc1d2d05335
名前 / ファイル ライセンス アクション
12602_PFR.pdf 12602_PFR (2.0 MB)
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Item type 学術雑誌論文 / Journal Article(1)
公開日 2023-02-24
タイトル
タイトル Data-Driven Approach on the Mechanism of Radiative Collapse in the Large Helical Device
言語
言語 eng
キーワード
主題Scheme Other
主題 Large Helical Device (LHD)
キーワード
主題Scheme Other
主題 radiative collapse
キーワード
主題Scheme Other
主題 density limit
キーワード
主題Scheme Other
主題 impurity
キーワード
主題Scheme Other
主題 stellarator-heliotron plasma
キーワード
主題Scheme Other
主題 sparse modeling
キーワード
主題Scheme Other
主題 data-driven science
キーワード
主題Scheme Other
主題 EMC3-EIRENE
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 YOKOYAMA, Tatsuya

× YOKOYAMA, Tatsuya

YOKOYAMA, Tatsuya

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YAMADA, Hiroshi

× YAMADA, Hiroshi

YAMADA, Hiroshi

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MASUZAKI, Suguru

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MASUZAKI, Suguru

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MIYAZAWA, Junichi

× MIYAZAWA, Junichi

MIYAZAWA, Junichi
MIYAZAWA, Jun-ichi

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MUKAI, Kiyofumi

× MUKAI, Kiyofumi

MUKAI, Kiyofumi

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PETERSON, Byron

× PETERSON, Byron

PETERSON, Byron
PETERSON, Byron J.

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TAMURA, Naoki

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TAMURA, Naoki

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SAKAMOTO, Ryuichi

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SAKAMOTO, Ryuichi

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MOTOJIMA, Gen

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MOTOJIMA, Gen

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IDA, Katsumi

× IDA, Katsumi

IDA, Katsumi

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GOTO, Motoshi

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GOTO, Motoshi

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OISHI, Tetsutaro

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OISHI, Tetsutaro

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KAWAMURA, Gakushi

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KAWAMURA, Gakushi

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KOBAYASHI, Masahiro

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KOBAYASHI, Masahiro

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LHD Experiment Group

× LHD Experiment Group

LHD Experiment Group

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抄録
内容記述タイプ Abstract
内容記述 A radiative collapse predictor has been developed using a machine-learning model based on high-density plasma experiments in the Large Helical Device (LHD). Concurrently, the physical background of radiative collapse was discussed based on the distinct features extracted by a sparse modeling, which is one of the frameworks of data-driven science. Electron density, CIV and OV line emissions, and electron temperature at the plasma edge have been extracted as the key parameters of radiative collapse. Those parameters are relevant to the physical knowledge that the major cause of radiative collapse is the enhancement of radiative loss by light impurities in the plasma-edge region. Using these four parameters, the likelihood of occurrence of radiative collapse has been estimated. The behavior of plasma at the edge—in particular, the carbon impurities outside the last closed flux surface—has been evaluated using EMC3-EIRENE code for the phase with increasing likelihood, that is, the plasma is getting close to the collapse. It is shown that the radiation caused by the C3+ ion, which corresponds to the CIV emission, is enhanced in the region where electron temperature is around 10 eV.
書誌情報 Plasma and Fusion Research

巻 16, 号 Special Issue 1, p. 2402010, 発行日 2021-02-26
書誌的事項
the 29th International Toki Conference on Plasma and Fusion Research (ITC29)
出版者
出版者 The Japan Society of Plasma Science and Nuclear Fusion Research
ISSN
収録物識別子タイプ ISSN
収録物識別子 1880-6821
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA12346675
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 10.1585/pfr.16.2402010
権利
権利情報 (c) 2021 The Japan Society of Plasma Science and Nuclear Fusion Research
関連サイト
識別子タイプ DOI
関連識別子 https://doi.org/10.1585/pfr.16.2402010
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
12602
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