Item type |
研究報告書 / Research Paper(1) |
公開日 |
2010-02-05 |
タイトル |
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言語 |
en |
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タイトル |
Physics Studies on Helical Confinement Configurations with l=2 Continuous Coil Systems |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Iarge helical device |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
physics design optimization |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
MHD beta limit |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
particle loss |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
neoclassical transport |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
anomalous transport |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
drift wave turbulence |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
bootstrap current |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Ohkawa current |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
helical divertor |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_18ws |
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資源タイプ |
research report |
アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
"Yamazaki, K.
Ohyabu, N.
Okamoto, M.
Amano, T.
Todoroki, J.
Ogawa, Y.
Nakajima, N.
Akao, H.
Asao, M.
Fujita, J.
Hamada, Y.
Hayashi, T.
Kamimura, T.
Kaneko, H.
Kuroda, T.
Morimoto, S.
Noda, N.
Obiki, T.
Sanuki, H.
Sato, T.
Satow, T.
Wakatani, M.
Watanabe, T.
Yamamoto, J.
Motojima, O.
Fujiwara, M.
Iiyoshi, A.
LHD, Design Group"
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
"The physics studies have been carried out to optimize l=2 heliotron/torsatron configurations having continuous coil system for the Large Helical Device (LHD), focusing on beta-orbit-divertor compatibility requirement, neoclassical & anomalous transports, bootstrap & Ohkawa currents, and divertor layer analysis. The optimal m number is found ~ 10 for the LHD system based on three physics criteria: MHD stability (beta is greater than or equal to 5%), particle orbit confinement (loss-cone-free radius gamma_L is greater than or equal to1/3a_p (plasma minor radius)) and clean divertor layer (divertor-wall clearance Delta_dw is greater than or equal to 3cm). The pitch parameter of helical coil gamma_c is determined mainly from the beta-divertor condition. For the detailed prediction of LHD plasma parameters, 2.5-dimensional equilibrium-transport simulations including empirical or drift wave turbulence models are carried out, which reveal that the global confinement time is sensitive to the edge electron anomalous transport although ripple loss through the ion channel is dominant in the plasma core. When ripple-transport-optimized configurations are adopted, the bootstrap current is increased; however, the Ohkawa current may be utilized cancel this current. The divertor layer study clarifies peculiar magnetic properties of thin curved divertor layers and suggests the effectiveness of helical divertors. From these physics considerations within the related engineering constraints, a final standard LHD configuration (m=10, gamma_c=1.25, alpha^ast=0.1, where m, gamma_c and alpha^ast are toroidal mode, pitch and pitch modulation parameters of the helical coil, respectively) is determined." |
書誌情報 |
en : Research Report NIFS-Series
発行日 1990-09-01
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報告書番号 |
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NIFS-043 |
ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0915-633X |