We have successfully fabricated the Nb_3Sn superconducting wire with high strength and high conductive Cu-20wt.%Nb stabilizer for a superconducting magnet, and the disk plate with high strength and high conductive Cu-24 wt.% Ag composite of a resistive water-cooling magnet. Using such newly developed materials, a wide bore cryocooled superconducting magnet which will generate 10 T in a 360 mm room temperature bore is designed. A poly Bitter-type resistive magnet generating 20 T in a 32 mm room temperature bore will be combined with the 10 T cryocooled superconducting magnet, leading to realize a 30 T cryocooled hybrid magnet.
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