Patent ID: 8255022

Claim:
A cryostat and magnet coil system, the magnet coil system having a plurality of radially nested superconducting solenoid-shaped coil sections, the coil sections being electrically connected in series for production of a magnet field B 0 in a measuring volume, the cryostat and magnet coil system comprising: a first helium tank; a first volume of liquid helium disposed within said first helium tank, said first volume of liquid helium having a temperature T L <4 K; an LTS coil section of said magnet coil system of a conventional low temperature superconductor (LTS) disposed in said helium tank at said helium temperature T L ; a second helium tank; a second volume of liquid helium disposed within said second helium tank, said second volume of liquid helium having a temperature T H >2.2 K; at least one HTS section of said magnet coil system having a high temperature superconductor (HTS), said HTS section disposed within said second helium tank, radially within said LTS section; and at least one wall disposed between said first and said second helium tanks to separate said HTS and said LTS sections.