A large bore (104 mm) 7 T superconducting solenoid magnet has been fabricated. Optimization of the design has been done with regard to conductor selection, field efficiency, mechanical integrity, operation reliability and winding geometry. The magnet is designed to accommodate a suitable Nb{sub}3Sn insert for producing magnetic field in excess of 10 T in a bore of 52 mm. The same magnet can also be integrated with a room temperature 75 mm bore cryostat and produce a field of 7 T. The magnet has an over all diameter of 181 ram and a winding length of 220 mm. The main considerations for winding geometry are good field homogeneity and low-speak field. The magnet is made in two sections, with each section carrying the same current but different current density for increased efficiency. The magnet is expected to produce a central magnetic field of 7.5 T at 100 A with a field homogeneity of 0.06% over 10 mm SDV. At 100A, the magnet will have a stored energy of about 64 KJ.
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