| 摘要 |
<p>A superconducting coil includes: a wire-wound section (5) composed of a winding bobbin (8) and superconducting wires (6) wound in layers around the winding bobbin (8); and metal plates (9) each of which is provided between the layers formed with the superconducting wires (6). The metal plate (9) is provided with projected portions (9b) that extend along the superconducting wires (6), between adjacent ones of the superconducting wires (6) in the same layer. The winding bobbin (8) includes a cylindrical part (8a), and a pair of flanges (8b, 8c) that are provided at both ends of the cylindrical part (8a) in the axis direction so as to be thermally connected with the cylindrical part (8a). The metal plate (9) has contact areas (9a) in contact with the superconducting wires (6), and a lead area (9c) that extends from the contact areas (9a) toward the flange (8b) and has a width in the circumferential direction of the cylindrical part (8a) smaller than that of the contact area (9a) in the circumferential direction. The lead area (9c) passes through the flange (8b) and reaches a cooling head (10) that is thermally connected to a freezing machine (3) and the flange (8b). Thus, a superconducting coil (2) that is capable of suppressing an increase in the temperature gradient occurring inside the wire-wound section (5).</p> |
