| 摘要 |
PURPOSE:To enable optional magnetic field introduction by arranging superconductive material around ferromagnetic material. CONSTITUTION:Superconductive material 3 surrounds ferromagnetic material 4. That is, magnetic field 6 generated by a magnet 1 is taken in from the end face of its large cross sectional area of the so-called bugle-shaped magnetic field introduction material 5 where the cross sectional area of one end is remarkably larger than that of the other end, and it is introduced into a desired position P. By measuring the magnetic field near the end on the side that the cross section is smaller this way, as the measured magnetic field strength becomes larger, the measurement becomes easy and accurate. |
