Superconductive magnet coil assembly comprising a plurality of layer-wound strip-like superconductors

A superconductive magnet coil assembly comprising a layer-wound coil that is cylindrically symmetric with respect to an axis of symmetry and is configured for generating an operating magnetic field in a working volume around the axis of symmetry, and having a sectional plane that contains the axis of symmetry and intersects the coil, the coil having a rectangular coil cross section in the sectional plane, which cross section is defined by a radially inner and a radially outer coil edge and a first axial and a second axial coil edge defined by a position of a radially innermost winding and a radially outermost winding of the coil that are at a smallest and a largest distance, respectively, from the axis of symmetry, and by a position of a first axial and a last axial winding of the coil having smallest and largest coordinates, respectively, in the direction of the axis of symmetry, the coil comprising at least one first strip-like superconductor and one second strip-like superconductor, the strip-like superconductors having a width-to-thickness ratio of >3, and the strip-like superconductors being guided into a region outside the rectangular coil cross section and being electrically connected there, wherein a rectangular cross section of the coil comprises:

• a first rectangular portion within the rectangular coil cross section which completely spans the coil cross section in the direction of the axis of symmetry,
• at least one second rectangular portion and at least one third rectangular portion, each within the first rectangular portion which span the first rectangular portion completely in the radial direction and in part in the axial direction, the second rectangular portion being completely wound with the first strip-like superconductor, and the third rectangular portion being completely wound with the second strip-like superconductor, and the second rectangular portion and the third rectangular portion being disjunct,
• and wherein the strip-like superconductors have different superconducting current-carrying capacities when each of:
• (i) the field, (ii) the field direction relative to the strip plane, and (iii) the temperature, are the same.