バルク超電導材料の基礎と応用　　ＲＥ‐Ｂａ‐Ｃｕ‐Ｏバルク材料の放射線照射による臨界電流の向上

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タイトル別名
  • Properties and Applications of Bulk High Temperature Superconductors. Enhancement of Critical Current Densities by Radiation in RE-Ba-Cu-O Bulk Superconductor.
  • カイセツ RE Ba Cu Oバルク ザイリョウ ノ ホウシャセン ショウシャ ニ ヨル リンカイ デンリュウ ノ コウジョウ

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説明

Irradiation of superconducting material with particles, such as electrons, protons, neutrons, ions etc., is known as a valuable tool to introduce pinning centers in a controlled way. Due to its extremely large penetration range, neutron irradiation is thought to be most suitable for the production of randomly distributed defects in bulk materials. Fast neutrons produce spherical cascade defects with a diameter of approximately 5-6nm. The trapped field of a Y-Ba-Cu-O bulk sample was found to be increased up to 3.7T at 77K by fast neutron irradiation, which suggests the practical importance of this technique. On the other hand, by using thermal neutron irradiation, we can create fission tracks in the sample doped with uranium, which causes a dramatic enhancement of Jc.

収録刊行物

  • 低温工学

    低温工学 34 (11), 556-560, 1999

    公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)

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