The Supercon APC process is briefly reviewed.Process parameters requiring optimization for commercial production are discussed.Issues involved in the successful monofilament and multifilament billet size scale-up the APC process for HEP composites, nominally 6 p m filaments and composite diameters < 1 mm, are presented. The Supercon APC composite piece length and mechanical properties are excellent.The present best composite Jc results are presented.
Supercon has applied its artificial pinning center (APC) technology to develop a multifilamentary NbTi superconductor for MRI application. This technology is particularly well suited to large filament, low field use. The conductor microstructure and performance (e.g., critical current) will be presented. The influence of conductor geometry (e.g., filament placement, spacing to diameter ratio) on filament quality will be discussed. The conductor has been incorporated into Magnetic Resonance Imaging (MRI) magnets by G E Medical Systems, and the magnets' performance will be discussed.
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