Superconductor high gradient magnetic separator

This patent describes a high gradient superconductor magnet separator comprising, a hollow cylindrical enclosure made of ferrous material and having an axially disposed flow passage therethrough, a toroidal shaped vacuum vessel in the cylindrical enclosure, a toroidal shaped liquid nitrogen vessel in the vacuum vessel, and a toroidal shaped liquid helium vessel in the vacuum vessel. The toroidal shaped liquid helium vessel is disposed concentrically to and above the liquid nitrogen vessel and spaced therefrom. A coil made of superconducting material is in the liquid helium vessel, and an inner coil support ring is in the vacuum vessel and concentric to the flow passage. The inner coil support ring has a lower end supported on the vacuum vessel and an upper end engaging the vacuum vessel. An outer coil support ring has an upper end attached to the liquid helium vessel and a lower end attached to the liquid helium vessel and an intermediate part attached to an intermediate part of the inner coil support ring at a position spaced from the upper and lower ends of the inner coil support ring