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  1. NIFS Series
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Impact of Magnetic Shear Modification on Confinement and Turbulent Fluctuations in LHD Plasmas

http://hdl.handle.net/10655/2525
http://hdl.handle.net/10655/2525
d3f18e01-5996-48fd-bc2c-2075a732979d
Item type 研究報告書 / Research Paper(1)
公開日 2010-02-05
タイトル
タイトル Impact of Magnetic Shear Modification on Confinement and Turbulent Fluctuations in LHD Plasmas
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 "Fukuda, T.

× "Fukuda, T.

en "Fukuda, T.

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Tamura, N.

× Tamura, N.

en Tamura, N.

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Ida, K.

× Ida, K.

en Ida, K.

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Michael, C.

× Michael, C.

en Michael, C.

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Tanaka, K.

× Tanaka, K.

en Tanaka, K.

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Vyacheslavov, L. N.

× Vyacheslavov, L. N.

en Vyacheslavov, L. N.

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Yoshinuma, M.

× Yoshinuma, M.

en Yoshinuma, M.

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Kobuchi, T.

× Kobuchi, T.

en Kobuchi, T.

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Watanabe, K. Y.

× Watanabe, K. Y.

en Watanabe, K. Y.

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Funaba, H.

× Funaba, H.

en Funaba, H.

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Igami, H.

× Igami, H.

en Igami, H.

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Itoh, K.

× Itoh, K.

en Itoh, K.

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Ido, T.

× Ido, T.

en Ido, T.

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Inagaki, S.

× Inagaki, S.

en Inagaki, S.

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Oishi, T.

× Oishi, T.

en Oishi, T.

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Kato, T.

× Kato, T.

en Kato, T.

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Kado, S.

× Kado, S.

en Kado, S.

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Kubo, S.

× Kubo, S.

en Kubo, S.

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Goto, M.

× Goto, M.

en Goto, M.

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Sakamoto, R.

× Sakamoto, R.

en Sakamoto, R.

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Satake, S.

× Satake, S.

en Satake, S.

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Shimizu, A.

× Shimizu, A.

en Shimizu, A.

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Shimozuma, T.

× Shimozuma, T.

en Shimozuma, T.

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Suzuki, C.

× Suzuki, C.

en Suzuki, C.

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Sudo, S.

× Sudo, S.

en Sudo, S.

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Takeiri, Y.

× Takeiri, Y.

en Takeiri, Y.

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Toi, K.

× Toi, K.

en Toi, K.

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Tokuzawa, T.

× Tokuzawa, T.

en Tokuzawa, T.

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Nakano, H.

× Nakano, H.

en Nakano, H.

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Narihara, K.

× Narihara, K.

en Narihara, K.

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Nishimura, S.

× Nishimura, S.

en Nishimura, S.

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Notake, T.

× Notake, T.

en Notake, T.

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Minami, T.

× Minami, T.

en Minami, T.

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Muto, S.

× Muto, S.

en Muto, S.

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Morita, S.

× Morita, S.

en Morita, S.

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Liu, Y.

× Liu, Y.

en Liu, Y.

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Pavlichenco, R.

× Pavlichenco, R.

en Pavlichenco, R.

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Yamada, H.

× Yamada, H.

en Yamada, H.

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Yamada, I.

× Yamada, I.

en Yamada, I.

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Yokoyama, M.

× Yokoyama, M.

en Yokoyama, M.

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Kawahata, K.

× Kawahata, K.

en Kawahata, K.

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Komori, A.

× Komori, A.

en Komori, A.

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the, LHD experimental group"

× the, LHD experimental group"

en the, LHD experimental group"

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抄録
内容記述タイプ Abstract
内容記述 "For the comprehensive understandings of transport phenomena in toroidal confinement systems and improvement of the predictive capability of burning plasmas in ITER, the impact of magnetic shear has been extensively investigated in the Large Helical Device (LHD) for comparison with tokamaks. Consequently, it was heuristically documented that the pronounced effect of magnetic shear, which has been hitherto considered to be ubiquitous and strongly impacts the core transport in the tokamak experiments, is not quite obvious. Namely, the kinetic profiles respond little under extensive modification of the magnetic shear in the core, although the local transport analysis indicates the sign of improvement in confinement transiently when the magnetic shear is reduced. It was thereby concluded that the magnetic shear in the core strongly influences the MHD activity, but it may only be one of the necessary conditions for the transport reduction, and some other crucial knobs, such as the density gradient or T_e/T_i ratio, would have to be simultaneously controlled. The low wavenumber turbulence seems to be suppressed under the weak shear, and the turbulent fluctuation intensity behaves in a consistent manner as a whole, following the conventional paradigm accumulated in the negative shear experiments in tokamaks. However, vigorous dynamics of turbulent fluctuations have occasionally been observed under the magnetic shear modification, which respond in much faster time scale than the characteristic time scale for either the magnetic diffusion or the profile evolution."
書誌情報 en : Research Report NIFS-Series

発行日 2008-10-01
報告書番号
NIFS-901
ISSN
収録物識別子タイプ ISSN
収録物識別子 0915-633X
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Cite as

"Fukuda, T., Tamura, N., Ida, K., Michael, C., Tanaka, K., Vyacheslavov, L. N., Yoshinuma, M., Kobuchi, T., Watanabe, K. Y., Funaba, H., Igami, H., Itoh, K., Ido, T., Inagaki, S., Oishi, T., Kato, T., Kado, S., Kubo, S., Goto, M., Sakamoto, R., Satake, S., Shimizu, A., Shimozuma, T., Suzuki, C., Sudo, S., Takeiri, Y., Toi, K., Tokuzawa, T., Nakano, H., Narihara, K., Nishimura, S., Notake, T., Minami, T., Muto, S., Morita, S., Liu, Y., Pavlichenco, R., Yamada, H., Yamada, I., Yokoyama, M., Kawahata, K., Komori, A., the, LHD experimental group", 2008, Impact of Magnetic Shear Modification on Confinement and Turbulent Fluctuations in LHD Plasmas.

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