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  1. NIFS Series
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Characteristics of High-Ion-Temperature Plasmas Heated by Neutral Beams in the Large Helical Device

http://hdl.handle.net/10655/2471
http://hdl.handle.net/10655/2471
a7ca8273-4373-4401-938a-06795b6f1f1d
Item type 研究報告書 / Research Paper(1)
公開日 2010-02-05
タイトル
タイトル Characteristics of High-Ion-Temperature Plasmas Heated by Neutral Beams 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_18ws
資源タイプ research report
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 "Nagaoka, K.

× "Nagaoka, K.

en "Nagaoka, K.

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Yokoyama, M.

× Yokoyama, M.

en Yokoyama, M.

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Takeiri, Y.

× Takeiri, Y.

en Takeiri, Y.

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Ida, K.

× Ida, K.

en Ida, K.

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Yoshinuma, M.

× Yoshinuma, M.

en Yoshinuma, M.

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Matsuoka, S.

× Matsuoka, S.

en Matsuoka, S.

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Morita, S.

× Morita, S.

en Morita, S.

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Tanaka, K.

× Tanaka, K.

en Tanaka, K.

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Funaba, H.

× Funaba, H.

en Funaba, H.

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Ikeda, K.

× Ikeda, K.

en Ikeda, K.

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Osakabe, M.

× Osakabe, M.

en Osakabe, M.

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Mutoh, T.

× Mutoh, T.

en Mutoh, T.

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Seki, T.

× Seki, T.

en Seki, T.

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Tsumori, K.

× Tsumori, K.

en Tsumori, K.

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Oka, Y.

× Oka, Y.

en Oka, Y.

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Kaneko, O.

× Kaneko, O.

en Kaneko, O.

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LHD, experimental group"

× LHD, experimental group"

en LHD, experimental group"

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抄録
内容記述タイプ Abstract
内容記述 "Improvement of ion heat transport in Heliotron plasmas has been realized by upgrade of ion heating power by using low energy neutral beam (NB) in the Large Helical Device (LHD). Ion internal transport barrier (ITB) (the peaked profile of ion temperature (T_i) with steep gradient in the core region) has been formed and the central T_i of 6.8 keV has been achieved in hydrogen plasma with the line-averaged electron density of 2 x 10^19 m^-3. The experimental ion thermal diffusivity significantly decreases to the neoclassical level, indicating significant reduction of anomalous transport. The analysis of neoclassical ambipolar diffusion showed the enhancement of the negative radial electric field (E_r<0) associated with the T_i increase, indicating that the anomalous transport is suppressed by the negative E_r. The ion transport inside the ITB shows negative dependence on the T_i and heating power, while that outside of ITB shows gyro-Bohm properties."
書誌情報 en : Research Report NIFS-Series

発行日 2008-10-01
報告書番号
NIFS-891
ISSN
収録物識別子タイプ ISSN
収録物識別子 0915-633X
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