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 |
New Evaluation Method of Superconductor Characteristics for Realizing the Large Helical Device |
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 |
fusion magnet |
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 |
Large 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 |
superconducting magnet |
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 |
NbTi superconductor |
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 |
characteristics of superconductor |
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 |
"Yamamoto, J.
Motojima, O.
Mito, T.
Takahata, K.
Yanagi, N.
Yamada, S.
Chikaraishi, H.
Imagawa, S.
Iwamoto, A.
Kaneko, H.
Nishimura, A.
Satoh, S.
Satow, T.
Tamura, H.
Yamaguchi, S.
Yamazaki, K.
Fujiwara, M.
Iiyoshi, A.
LHD, 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 |
"It is necessary to apply extra large scale superconducting magnets for a fusion device like Large Helical Device (LHD). Because of the relatively larger current (10kA or more), new evaluation method to determine the fundamental characteristics of superconductors have to be developed, which are already established for thin superconducting wires. In this paper, a measuring method of critical current, stability margin, current distribution are mainly discussed. Bath-cooled composite type and supercritical helium force-cooled type NbTi conductors have been chosen for helical coils and poloidal coils of LHD, respectively. A critical current of a conductor was measured as follows. Two 2 m long parallel conductors, which were connected each other at the bottom, were inserted in a 9 T split coil. The surface of the conductor was covered 50% by spacers to simulate heat transfer conditions. The time dependent transition phenomena between normal and superconducting state are observed by voltage distribution along the conductor. On study of forced flow cooled conductors, the current transfer from a quenching strand to another strand was measured by pick up coils on a conduit. We measured its stability margin by a pancake-type coil as a long sample test. The major measurement results of bath- and forced-cooled LHD conductors using this system have given enough fundamental data of high current multistrand conductors for the LHD." |
書誌情報 |
en : Research Report NIFS-Series
発行日 1994-08-01
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報告書番号 |
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NIFS-297 |
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 |