M
Motomune Kodama
Researcher at Hitachi
Publications - 48
Citations - 259
Motomune Kodama is an academic researcher from Hitachi. The author has contributed to research in topics: Superconducting wire & Oxide. The author has an hindex of 7, co-authored 44 publications receiving 202 citations. Previous affiliations of Motomune Kodama include University of Tokyo.
Papers
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Journal ArticleDOI
High-performance dense MgB2 superconducting wire fabricated from mechanically milled powder
Motomune Kodama,Motomune Kodama,Takaaki Suzuki,Hideki Tanaka,Kenji Okishiro,Kazutaka Okamoto,Gen Nishijima,Akiyoshi Matsumoto,Akiyasu Yamamoto,Jun-ichi Shimoyama,Kohji Kishio +10 more
TL;DR: In this article, a method of using precursor powder prepared by mechanical milling of magnesium, boron, and coronene powders was proposed to obtain a high critical current density of 103 A mm−2.
Journal ArticleDOI
Conduction-Cooled MgB2 Coil in Maximum Self-Magnetic Flux Density 2.3 Tesla Made With 300-Meter-Long Multifilamentary MgB2 Wire
Hideki Tanaka,Motomune Kodama,Yota Ichiki,Toshiaki Kusunoki,Hiroshi Kotaki,Takaaki Suzuki,Kazuya Nishi,Kazutaka Okamoto +7 more
TL;DR: In this article, a 300m-long multifilamentary MgB====== 2====== wire was fabricated as a powder-in-tube wire by using an in situ method and a coil was designed to be driven in the maximum magnetic flux density in Mgb====== 2¯¯ filaments over 2 T. The coil was made by using a wind-andreact method and cooled by using conduction cooling.
Patent
Superconducting switch, superconducting magnet and MRI
TL;DR: In this article, a superconducting switch is provided in which the structural strength of the switch is kept, and thermal efficiency is high when an ON state (superconducting state) and an OFF state (normal conducting state) are switched.
Journal ArticleDOI
Mechanism for high critical current density in in situ MgB2 wire with large area-reduction ratio
Motomune Kodama,Yota Ichiki,Kazuhide Tanaka,Kazutaka Okamoto,Akiyasu Yamamoto,Jun-ichi Shimoyama +5 more
TL;DR: In this article, a comparative study of in situ MgB2 wire and bulk Mg-B2 powders was carried out to clarify the mechanism for the high critical current density, Jc, in the practical in situ in situ mg-b2 wires, which was manufactured with an area reduction ratio of 99.93%.
Journal ArticleDOI
Performance of MgB2 Superconductor Developed for High-Efficiency Klystron Applications
Hideki Tanaka,Takaaki Suzuki,Motomune Kodama,Tomoyuki Koga,Hiroyuki Watanabe,Akira Yamamoto,Shinichiro Michizono +6 more
TL;DR: In this paper, an 8 km long MgB BaseType 2 wire for a prototype klystron magnet was made and evaluated, and the homogeneity of the entire wire length was evaluated by several methods.