垂直磁界中の超伝導平板におけるベクトルポテンシヤル分布

概要

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A shielded region in a superconducting plate under a perpendicular magnetic field is surrounded by two regions of current flowing in opposite directions each other. This front configuration can be well approximated by a curve similar to a parabola, but having a power of the nth order. In this study, vector potentials produced by these currents are calculated in the space including the superconducting plate. The equipotential value gives a visual determination of the flux line distribution, from which we can estimate a shielding effect near or inside the current front. For example, adopting appropriate parameters of the nth power curve, we can find a flux line flowing very closely to the front curve. The potential value corresponding with the flux line is about 0.1% of the external filed potential. Distribution of the potential inside the shielded regions is then examined precisely. As a result, it is found that any shielded potential inside the front curve can be suppressed to below 0.1% of the external filed potential.
福岡工業大学の論文
2006-02-28