低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
動的安定化による高電流密度大型超伝導導体の可能性に関する研究
II. 安定性マージン
小笠原 武
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1987 年 22 巻 3 号 p. 181-185

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In succession of part I of this paper, the stability margin of a tape superconductor is analysed theoretically in order to prove scientific feasibility of high current density, large-scale superconductors. As a typical example, Cu-Nb3Sn-Cu conductor is investigated: The thickness of Cu and Nb3Sn are 1mm and 50μm, respectively and the strip width is 50mm. If the critical current density of limiting stability Jc=1.29×1010A/m2 is assumed, the stability margin of pulsive field applied perpendicular to the broad face of the conductor becomes 4.9T. The thermal margin is shown to be about 5×104J/m3 when disturbances are point-like, transient nature. These results indicate that the tape conductor is stable enough to be wound into superconducting magnets.

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