Patent ID: 7982566

Claim:
A cryostat and magnet coil system, the magnet coil system having a plurality of radially nested superconducting solenoid-shaped coil sections surrounding a room temperature bore defined by the cryostat, the coil sections being electrically connected in series for production of a magnet field B 0 in a measuring volume within the room temperature bore, the cryostat and magnet coil system comprising: a helium tank for holding liquid helium at a helium temperature T L , said helium tank having a wall facing the room temperature bore of the cryostat; an LTS section of a conventional low temperature superconductor (LTS) disposed in said helium tank at said helium temperature T L ; means defining a vacuum portion of the cryostat; and at least one HTS section disposed radially within said LTS section and within said vacuum portion of the cryostat, said HTS section being separated from said LTS section by said wall of said helium tank facing said room temperature bore.