Patent ID: 8818471

Claim:
A superconducting coil device, comprising: a plurality of coil units arranged in a circle to form a toroidal shape, wherein each of the plurality of coil units comprises: a cryostat; a superconducting coil, comprising: a plurality of superconducting element coils stored in the cryostat, and respectively comprising a plurality of coil bobbins and a plurality of superconducting coil windings wound around the corresponding coil bobbins; an inter-coil spacer stored in the cryostat between adjacent two of the plurality of coil bobbins to support the adjacent two coil bobbins; a first end member stored in the cryostat to support a leftmost coil bobbin among the plurality of coil bobbins, the first end member defining a first side surface of the coil unit; and a second end member stored in the cryostat to support a rightmost coil bobbin among the plurality of coil bobbins, the second end member defining a second side surface of the coil unit; and an inward load biasing device stored in the cryostat to bias the superconducting coil toward a center of the circle when the plurality of superconducting element coils is not excited, and wherein, for each of the plurality of coil units, the first side surface is parallel with a radial direction of the circle, and the second side surface is parallel with another radial direction the of the circle and arranged opposite to the first side surface in a circumferential direction of the circle, the angle formed by the first side surface and the second side surface is 360/n degrees, where n is an integer representing the number of the plurality of coil units constituting the superconducting coil device, the first side surface is in direct surface contact with the second side surface of an adjacent coil unit among the plurality of coil units on a first side in the circumferential direction of the circle, and the second side surface is in direct surface contact with the first side surface of another adjacent coil unit among the plurality of coil units on a second, opposite side in the circumferential direction of the circle.