Abstract: A superconductor magnet system (2) includes a cryostat (4), a superconductor bulk magnet (5), and a cryogenic cooling system (12). The bulk magnet (5) has at least N axially stacked bulk sub-magnets (6a-6c), with N?3. Between each two axially neighboring bulk sub-magnets, an intermediate body (7a-7b) is arranged. The intermediate bodies (7a-7b) are made from a non-metallic thermal insulator material. The cryogenic cooling system (12) is adapted for independently controlling the temperature of each bulk sub-magnet (6a-6c), and has, for each bulk sub-magnet, a temperature sensor (16a-16c) for sensing the temperature of the respective bulk sub-magnet and an adjustment unit (13a-13c) for adjusting a heating power and/or a cooling power at the respective bulk sub-magnet.

Abstract: Charging method for a superconductor magnet system with reduced stray field, weight and space includes: arranging the system within a charger magnet bore; with Tmain>Tmaincrit and Tshield>Tshieldcrit, applying a current Icharger to the charger magnet and increasing Icharger to a first current I1>0; lowering a main superconductor bulk magnet temperature Tmain to an operation temperature Tmainop, with Tmainop<Tmaincrit, while keeping Tshield>Tshieldcrit; lowering Icharger to a second current I2<0, thereby inducing a persistent current IPmain in the main magnet; lowering a shield magnet temperature Tshield to an operation temperature Tshieldop, with Tshieldop<Tshieldcrit; increasing Icharger to zero, thereby inducing a persistent current IPshield in the shield magnet; removing the magnet system from the charger bore, and keeping Tmain?Tmainop with Tmainop<Tmaincrit and Tshield?Tshieldop with Tshieldop<Tshieldcrit; where: Tmaincrit: main magnet critical temperature and Tshieldcrit: shie

Abstract: A superconducting magnet assembly with a reinforced coil region (3) having a layered conductor coil assembly (10) forming cylindrical conductor layers (11, . . . ), each having plural circular conductor turns (12) centered around and aligned along the axis of cylindrical symmetry (z). The reinforced coil region further includes a layered corset coil assembly (20) having an inner radius bigger than an outer radius of the layered conductor coil assembly (10), and a corset sheet assembly (30) including a foil element forming a corset sheet (31, . . . ). A cross section of the corset sheet with any plane perpendicular to the z-axis forms a segmented circle centered around the z-axis, the radius of which is bigger than that of one of the conductor layers and smaller than that of another of the conductor layers. In addition, the segmented circle covers at least 90% of a full circle but has at most four segments. The assembly provides mechanical reinforcement against radial magnetic forces.

Abstract: A superconducting magnet assembly with a reinforced coil region (3) having a layered conductor coil assembly (10) forming cylindrical conductor layers (11, . . . ), each having plural circular conductor turns (12) centered around and aligned along the axis of cylindrical symmetry (z). The reinforced coil region further includes a layered corset coil assembly (20) having an inner radius bigger than an outer radius of the layered conductor coil assembly (10), and a corset sheet assembly (30) including a foil element forming a corset sheet (31, . . . ). A cross section of the corset sheet with any plane perpendicular to the z-axis forms a segmented circle centered around the z-axis, the radius of which is bigger than that of one of the conductor layers and smaller than that of another of the conductor layers. In addition, the segmented circle covers at least 90% of a full circle but has at most four segments. The assembly provides mechanical reinforcement against radial magnetic forces.

Abstract: A superconductor magnet system (2) includes a cryostat (4), a superconductor bulk magnet (5), and a cryogenic cooling system (12). The bulk magnet (5) has at least N axially stacked bulk sub-magnets (6a-6c), with N?3. Between each two axially neighboring bulk sub-magnets, an intermediate body (7a-7b) is arranged. The intermediate bodies (7a-7b) are made from a non-metallic thermal insulator material. The cryogenic cooling system (12) is adapted for independently controlling the temperature of each bulk sub-magnet (6a-6c), and has, for each bulk sub-magnet, a temperature sensor (16a-16c) for sensing the temperature of the respective bulk sub-magnet and an adjustment unit (13a-13c) for adjusting a heating power and/or a cooling power at the respective bulk sub-magnet.

Abstract: Charging method for a superconductor magnet system with reduced stray field, weight and space includes: arranging the system within a charger magnet bore; with Tmain>Tmaincrit and Tshield>Tshieldcrit, applying a current Icharger to the charger magnet and increasing Icharger to a first current I1>0; lowering a main superconductor bulk magnet temperature Tmain to an operation temperature Tmainop, with Tmainop<Tmaincrit, while keeping Tshield>Tshieldcrit; lowering Icharger to a second current I2<0, thereby inducing a persistent current IPmain in the main magnet; lowering a shield magnet temperature Tshield to an operation temperature Tshieldop, with Tshieldop<Tshieldcrit; increasing Icharger to zero, thereby inducing a persistent current IPshield in the shield magnet; removing the magnet system from the charger bore, and keeping Tmain?Tmainop with Tmainop<Tmaincrit and Tshield?Tshieldop with Tshieldop<Tshieldcrit; where: Tmaincrit: main magnet critical temperature and Tshieldcrit: shie