Bruker Biospin Gmbh

Axel Lausch

Gerhard Roth

A cryostat () with a magnet coil system including superconductors for the production of a magnet field Bin a measuring volume () has a plurality of radically nested solenoid-shaped coil sections () and which are electrically connected in series, at least one of which being an LTS section () with a conventional low temperature superconductor (LTS) and at least one of which being an HTS section () including a high temperature superconductor (HTS), wherein the magnet coil system is located in a helium tank () of the cryostat () along with liquid helium at a helium temperature TK. The apparatus is characterized in that heating means are provided which always keep the HTS at an increased temperature T&#x3e;Tand T&#x3e;2.2 K. The cryostat in accordance with the invention can maintain the HTS section over a long period of time in a reliable manner.

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Munich, Georgia

Axel Lausch