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Conductively cooled Nb3Sn magnet system for a magnetic refrigerator

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6 Author(s)
J. R. Rowe ; Astronaut. Technol. Center, Madison, WI, USA ; J. A. Hertel ; J. A. Barclay ; C. R. Cross
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A Nb3Sn magnet system for use in a magnetic refrigerator has been developed and tested. The system incorporates four asymmetric windings arranged as two Helmholtz pairs to produce two profiled field regions, required for a Carnot cycle. System components are cooled by conductive heat transfer to enable eventual operation in vacuum without liquid helium. Design features include low-resistance joints and superconducting interconnecting buses for low-ohmic losses in the persistent mode. The magnets are produced by the wind-and-react method on iron forms, followed by epoxy impregnation. The system requirements and design are described in further detail, and test results are presented

Published in:

IEEE Transactions on Magnetics  (Volume:27 ,  Issue: 2 )