Abstract
A class of large diameter internal tin wires have been developed which carry over 900 Amps at a wire diameter of 1.8 mm, 4.2 K, 14 T. Historically high current density (Jc (10T, 4.2K) > 2000 A/mm2) internal tin wires have been limited to smaller wire diameters. We report critical current and magnetization results on a wire design tested from 1.8 mm to 0.5 mm diameter. At smaller wire diameters the Modified Jelly Roll (MJR) element size drops below 20 µm. The small MJR elements result in a small deff which has the potential to meet the ITER specification in a wire that has a Jc in excess of 1400 A/mm2 at 12 T, 4.2K.
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References
S. T. Wang. et al., “Evaluation of Nb3Sn Superconductors for Use in a 23.5T NMR magnet,” IEEE Trans. Mag., 30: 2344, (1944).
G. Ozeryansky, and E. Gregory, “A New Internal-Tin Nb3Sn Conductor Made by a Novel Manufacturing Process,” IEEE Trans. Mag., 27: 1755, (1991).
W. K. McDonald, “Composite construction process and superconductor produced there by “, U.S. Patent 4,262, 412 (1981)
W. K. McDonald, “Expanded metal containing wires and filaments,” U.S. Patent 4, 414, 428, (1983).
D. B. Smathers, “The Modified Jelly Roll Process for manufacturing multifilament niobium-tin composite superconductors,” in International Symposium Tantalum and Niobium - Proceedings ( Tantalum-Niobium International Study Center, Brussels, 1989 ), p. 707.
J. C. McKinnell, P.M. O’Larey, M. B. Siddall “ Reduced Filament bundle diameters for improved hysteresis loss in Modified Jelly Roll Nb3Sn wires,” IEEE Trans., Appl. Superconductivity 5: 1599, (1995).
J. C. McKinnell, et al. “Improved Superconducting critical current density in Modified Jelly Roll Nb3Sn by the application of niobium (Nb) diffusion barriers,” IEEE Trans. Appl. Superconductivity, 5: 1786, (1995).
P. Bruzzone, presented at the strand supplier meeting, Pittsburgh, PA, August 25, 1996.
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© 1998 Springer Science+Business Media New York
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McKinnell, J.C., Jablonski, P.D. (1998). Development of Superconducting High Current Density Large Diameter Internal Tin (Nb3Sn) Wires. In: Balachandran, U.B., Gubser, D.G., Hartwig, K.T., Reed, R.P., Warnes, W.H., Bardos, V.A. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering, vol 44. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9056-6_122
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DOI: https://doi.org/10.1007/978-1-4757-9056-6_122
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