波形制御パルス着磁法によるGd-Ba-Cu-Oバルク超伝導体の捕捉磁場測定

概要

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For large-scale electric power application of the melt-processed high temperature superconductor (HTS) bulks, especially at rotating machine, development of trapping much higher magnetic fields by using pulsed magnetization technique is essential. A couple of vortex-type copper coils applied a pulse magnetic field to a Gd-Ba-Cu-O bulk at 77K. HTS bulk was magnetized by the controlled pulse field method without passive LCR pulse. In the present study, we applied the pulse magnetic field with the various risetime to the HTS bulk. The various conditions of the controlled waveform pulse to trap well-dressed profile magnetized the Gd-Ba-Cu-O bulk which trapped 1.12 T of magnetic flux density with conical distribution. Magnitude of the magnetic flux density which is trapped by using the static magnetic field becomes the boundary of the different dB/dt at pulse field magnetization. The boundary exists for the inherent magnetic properties of the bulk.
2008-03-24