Abstract
The present note describes the properties of superconducting composite wires consisting of 6·10-6 m Nb — 50% Ti filaments for the UNK magnets. The properties have been studied from the data on commercial batches of wires, 3000 km long and proceeding from the technology of twofold billets (55 × 162). A strand is 0.85·10-3 m in diameter and the copper-to-noncopper area ratio is 1.385/1. The current density in the filaments is (2550 ± 250)·106 A/m2 (B=5 T, T=4.23 K). The Residual Resistivity Ratio (RRR) for the initial copper is ≥ 160 and for the wire of the final size it is ≥ 70. The manufacturing technology for the wire with 6·10-6 m filaments from 0.25–0.3 m billets has been developed. The current density obtained in the strands from large billets is 2800±290 A/mm2. The current rise parameter is I0 ≃ 11 (n ≃ 50). Production of the wire for standard UNK magnets has begun.
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References
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© 1990 Plenum Press, New York
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Fil’kin, V.Y. et al. (1990). The Properties of Industrial Superconducting Composite Wires for the UNK Magnets. In: Reed, R.P., Fickett, F.R. (eds) Advances in Cryogenic Engineering Materials . An International Cryogenic Materials Conference Publication, vol 36. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9880-6_41
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DOI: https://doi.org/10.1007/978-1-4613-9880-6_41
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