Bruker Biospin Ag

Johannes Boesel

Daniel Guy Baumann

Daniel M Eckert

Beat Mraz

Agnès Glémot

An NMR apparatus comprising an NMR magnet system disposed in a first cryocontainer () of a cryostat (), and an NMR probe head (), wherein the first cryocontainer () is installed in an evacuated outer jacket and is surrounded by a radiation shield () and/or a further cryocontainer (), wherein a cooling device is provided for cooling the NMR probe head () and a cryocontainer (), which comprises a cold head () with several cold stages (), wherein one cold stage () is connected to a heat-transferring device, and wherein a cooling circuit is provided between the cooling device and the NMR probe head (), is characterized in that the cooling device is disposed in a separate, evacuated housing () which is positioned directly above the cryostat (), wherein the heat-transferring device is inserted directly into suspension tubes () of the cryocontainer () and/or is in contact with the radiation shield (). This effects a simple construction that is efficient for cooling an NMR apparatus.

NMR apparatus with commonly cooled probe head and cryogenic container and method for the operation thereof

A cryostat configuration has at least three centering elements () which are distributed about the periphery of a cryocontainer (). Each end () of the centering elements () facing away from an outer jacket () of the cryostat configuration is connected to an actuator () which exerts a pressure or tensile force on the respective centering element () to generate a mechanical tension in a corresponding centering element () which loads the centering elements () with a nearly constant pressure or tension, irrespective of the temperature changes within the cryostat configuration. This yields a cryostat configuration which permits pressure centering without overloading the centering elements.

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Neuheim, Switzerland

Johannes Boesel