高温超伝導コイルによる弱磁界の遮蔽

概要

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By using a high critical temperature oxide superconductor, superconductivity is realized even at the liquid nitrogen temperature. Perfect diamagnetism is one of the significant characteristics of a superconductor, by which shielding of weak magnetic field should be expected. The purpose of this study is to show the possibility of magnetic shielding of a weak magnetic field as high as 5 gauss, ten times that of the ear this field. The 10cm diameter-coils of copper wire shielded the magnetic fields of 3 to 5 gauss when the coils were put in magnetic fields of 3 to 5 gauss and fed with the currents which generated magnetic field of the reverse direction of the same strength. The high Tc Bi-oxide superconductor coils of the same dimensions as the copper coils showed ability of shielding the inner area of the coils from the weak external magnetic fields. However, a couple of problems in the superconductor coils prevented it from showing sufficient performance of the superconductor coils. This problem should be examined in future studies.
湘南工科大学の論文
2001-03-18