| 摘要 |
A superconducting magnet system with an operating temperature T<SUB>1</SUB><3K which is disposed in a first helium tank ( 4 ) of a cryostat ( 1 ), wherein a second helium tank ( 2 ) is provided which is connected to the first helium tank ( 4 ) and contains liquid helium at an operating temperature T<SUB>2</SUB>>3K, wherein a cooling means is provided in the first helium tank ( 4 ) which generates an operating temperature T<SUB>1</SUB><3K in that first helium tank ( 4 ) is characterized in that the cooling means is the cold end ( 19 ) of a pulse tube cooler ( 11 ) whose warm end ( 10 ) is disposed outside of the cryostat ( 1 ). The inventive magnet system minimizes the helium consumption thereby providing continuous measuring operation.
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