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Abrupt Flushing of High-Density Core in Internal Diffusion Barrier Plasmas and its Suppression by Plasma Shape Control in LHD
http://hdl.handle.net/10655/6352
http://hdl.handle.net/10655/63526cb4bcc5-31fb-4479-b76c-026a8d686316
名前 / ファイル | ライセンス | アクション |
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pfr2008_03-S1047.pdf (2.9 MB)
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Item type | 学術雑誌論文 / Journal Article_02(1) | |||||||||
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公開日 | 2011-03-24 | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | Abrupt Flushing of High-Density Core in Internal Diffusion Barrier Plasmas and its Suppression by Plasma Shape Control in LHD | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | heliotron | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | pellet injection | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | IDB | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | SDC | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | Shafranov shift | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | beta limit | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | equilibrium | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | elongation | |||||||||
キーワード | ||||||||||
言語 | en | |||||||||
主題Scheme | Other | |||||||||
主題 | MHD instability | |||||||||
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 |
MIYAZAWA, Junichi
× MIYAZAWA, Junichi× SAKAMOTO, Ryuichi× OHDACHI, Satoshi× KOBAYASHI, Masahiro× MASUZAKI, Suguru× MORISAKI, Tomohiko× SAKAKIBARA, Satoru× GOTO, Motoshi× MORITA, Shigeru× YAMADA, Ichihiro× NARIHARA, Kazumichi× FUNABA, Hisamichi× TANAKA, Kenji× MICHAEL, Clive A.× SUZUKI, Yasuhiro× WATANABE, Kiyomasa× OHYABU, Nobuyoshi× YAMADA, Hiroshi× Komori, Akio× MOTOJIMA, Osamu× LHD Experimental Group,
WEKO
66319
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抄録 | ||||||||||
内容記述タイプ | Abstract | |||||||||
内容記述 | Abrupt flushing of central density occurs in internal diffusion barrier (IDB) plasmas in the Large Helical Device (LHD), where a super dense core (SDC) of the order of 1020 m-3 is formed inside; this event is called “core density collapse (CDC).” CDC must be suppressed as further increase of the central pressure is inhibited. Since CDC is always accompanied by a large Shafranov shift of the plasma center, it has been supposed that mitigation of the Shafranov shift might affect CDC. Vertical elongation of the plasma shape (κ > 1) is effective in mitigating the Shafranov shift, and κ can be controlled with the quadrupole magnetic field BQ. To examine the impact of plasma shape control on CDC, BQ scan experiment has been performed in the LHD. The large Shafranov shift in IDB plasmas is mitigated by increasing κ. As a result, CDC is suppressed and high central β values of approximately 7% have been achieved in vertically elongated plasmas. The optimum κ varies with the magnetic configuration. Beta gradients greater than those at CDC in the κ = 1 configuration are observed without CDC in vertically elongated plasmas. | |||||||||
書誌情報 |
en : Plasma and Fusion Research 巻 Vol.3, p. S1047-1 - S1047-7, 発行日 2008-01-01 |
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出版者 | ||||||||||
出版者 | プラズマ・核融合学会 | |||||||||
DOI | ||||||||||
識別子タイプ | DOI | |||||||||
関連識別子 | 10.1585/pfr.3.S1047 | |||||||||
権利 | ||||||||||
権利情報 | ? 2008 The Japan Society of Plasma Science and Nuclear Fusion Research |