Abstract

A 25.05 T magnetic field was generated by a 5.11 T superconductingBi2Sr2CaCu2Ox insert magnet within a 19.94 T resistive magnet. TheBi2Sr2CaCu2Ox magnet is constructed using fully reacted powder-in-tube conductor and insulated stainlesssteel reinforcement. Three concentric sections are used to minimize the total stress in theBi2Sr2CaCu2Ox conductor: two double pancake stacks and an outer layer-wound section. The insert coiloperates at 4.2 K in a 0.168 m diameter cryostat fitted to the resistive magnet. Here weprovide an overview of the design and construction of the insert and the results of self-fieldand in-field testing. Mechanical and electrical safety issues, related to testing in a largeresistive magnet, are discussed.

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