K-2115 バルク超電導体を使った超電導永久磁石とその応用(G08-2 動力エネルギー(2))(G08 動力エネルギーシステム部門一般講演)

概要

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Superconducting permanent magnet systems generating magnetic fields of 2.9 T in the open space outside the vacuum vessel have been constructed for the first time in the world. The system was constructed by using c-axis oriented Sm-Ba-Cu-O bulk superconductors fabricated through the melt processing as trapped field magnets. The trapped magnetic fields of over 3 T and 6 T have been produced on the bulk surface at 30 K by the pulsed field magnetization (PFM) and field cooling (FC) methods, respectively. It was found that the iteratively magnetizing pulsed-field operation with reducing amplitudes (IMRA method) is very effective in magnetizing high critical current density J_c bulk superconductors. The superconducting permanent magnets thus composed can be used as high magnetic field generators in various practical applications such as magnetizing apparatuses, magnetic separation systems etc.
一般社団法人日本機械学会の論文
2001-08-22