Patent ID: 7952454

Claim:
A device for creating a uniform magnetic field in a zone of interest, in particular for nuclear magnetic resonance and magnetic resonance imaging, the device comprising an arrangement of superconductor coils placed around a longitudinal axis (z) of said zone of interest, which zone of interest lies inside said arrangement of superconductor coils, the device being characterized in that the arrangement of superconductor coils comprises at least one stack of a set of modular elements distributed along said longitudinal axis (z) and centered on said longitudinal axis (z), each modular element comprising a conductor of rectangular section made of superconductor material wound continuously in the form of a double pancake coil comprising a first single plane pancake coil, a second single plane pancake coil juxtaposed parallel to the first single pancake coil, and a transition segment without any internal junction between the first and second single pancake coils, each single pancake coil having a connection end situated at the outer peripheral portion of the pancake coil for connection via a junction to a connection end of an adjacent modular element, and the transition segment making it possible to offset the second single pancake coil along the longitudinal axis (z) relative to the first single pancake coil through a distance not less than the transverse dimension of the conductor along said axis, each of the first and second single plane pancake coils being made from half-circumferences of radius increasing by half the thickness of the conductor between two consecutive half-circumferences, and alternating between two centers for the half-circumferences that are separated by half the thickness of the conductor.