MR-scanner comprising - a superconducting magnet (24, 25), - a superconducting quantum processor, - a multi-stage refrigeration system, including - a first cooling system (1, 2, 3) surrounding the superconducting magnet, - a second cooling system (10, 27) surrounding the superconducting quantum processor, wherein the second cooling system (10, 27) is embedded in the first cooling system (2, 3), wherein the superconducting quantum processor is positioned within a region inside the coils of the superconducting magnet (24, 25) such that the magnetic field at the position of the superconducting quantum processor is comparatively low, wherein comparatively low means that the value of the static magnetic field is at least lower than an average value of the magnetic field in-between the superconducting coils, wherein the superconducting magnet (24, 25) comprises main field coils and shield coils, characterized by the superconducting quantum processor being positioned in a region inside the superconducting magnet coils (24, 25) in-between the main field coils and the shield coils such that the local magnetic field at the position of the superconducting quantum processor is reduced by a cancelling effect excited by the different coils (24, 25). - a superconducting magnet (24, 25), - a superconducting quantum processor, - a multi-stage refrigeration system, including - a first cooling system (1, 2, 3) surrounding the superconducting magnet, - a second cooling system (10, 27) surrounding the superconducting quantum processor, wherein the second cooling system (10, 27) is embedded in the first cooling system (2, 3), wherein the superconducting quantum processor is positioned within a region inside the coils of the superconducting magnet (24, 25) such that the magnetic field at the position of the superconducting quantum processor is comparatively low, wherein comparatively low means that the value of the static magnetic field is at least lower than an average value of the magnetic field in-between the superconducting coils, wherein the superconducting magnet (24, 25) comprises main field coils and shield coils, characterized by the superconducting quantum processor being positioned in a region inside the superconducting magnet coils (24, 25) in-between the main field coils and the shield coils such that the local magnetic field at the position of the superconducting quantum processor is reduced by a cancelling effect excited by the different coils (24, 25). - a first cooling system (1, 2, 3) surrounding the superconducting magnet, - a second cooling system (10, 27) surrounding the superconducting quantum processor, wherein the second cooling system (10, 27) is embedded in the first cooling system (2, 3), wherein the superconducting quantum processor is positioned within a region inside the coils of the superconducting magnet (24, 25) such that the magnetic field at the position of the superconducting quantum processor is comparatively low, wherein comparatively low means that the value of the static magnetic field is at least lower than an average value of the magnetic field in-between the superconducting coils, wherein the superconducting magnet (24, 25) comprises main field coils and shield coils, characterized by the superconducting quantum processor being positioned in a region inside the superconducting magnet coils (24, 25) in-between the main field coils and the shield coils such that the local magnetic field at the position of the superconducting quantum processor is reduced by a cancelling effect excited by the different coils (24, 25).