| 摘要 |
PURPOSE:To increase the number of magnetic fluxes generated from a coil by a method wherein a superconductive member is provided closely outside the coil so as to encircle the coil. CONSTITUTION:Ordinary wire is wound around the periphery of a resin made bobbin 11 in specified numbers of turns to provide a coil 12 and then a cylindrical superconductive member 13 is arranged to encircle the coil 12 making a gap g1 closely outside the coil 12. That is, the magnetic fluxes are mutually offset between adjacent strands by the Meissner effect of the superconductive member 13 to nullify the magnetic flux density so that the magnetic fluxes outside respective strands may lie in a line with the magnetic fluxes phiM of adjacent strands along the inner surface of the superconductive member 13 so as to make multiple layers of magnetic fluxes encircle the whole coil 12 for making a feedback magnetic path entering from the other end cf the coil 12 into the inside of the core 12. Through these procedures, the number of magnetic fluxes inside the coil 12 can be increased notably. |
