750 MHz NMR magnet development

The authors consider the development of a magnet for a high-resolution 750-MHz proton spectrometer. The magnet operates in persistent mode at a central field of 17.63 T. The tenth-order coil system consists of seven niobium-tin and five niobium-titanium sections. Rectangular cross-section conductors are used for high radial homogeneity and for high filling factor. The details of design, construction, and quench analysis are described, and results of some preliminary tests are presented.<
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