Abstract
Hashimoto et al. [1] have described a multifilamentary Nb3Sn superconductor produced by heat treatment of a composite consisting of niobium cores and a two-component matrix of pure copper and a high-tin bronze (Sn-20 wt.% Cu). The technical feasibility and economic advantages of this technique have been evaluated in the present study. This study included consideration of the likely cost per A • m and the overall current densities achievable with this new conductor design. Particular attention was devoted to high current (10 kA at 12 T) conductors suitable for application in magnets intended for experimental controlled thermonuclear reaction devices, such as the Fusion Engineering Research Facility (FERF) [2] at Lawrence Livermore Laboratory and the tokamak-type experimental reactors.
Work Supported by Energy Research and Development Administration through the Lawrence Livermore Laboratory.
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Abbreviations
- A R :
-
radius of the extruded rod
- C:
-
heat capacity of the billet material
- d ƒ :
-
diameter of the circle fully circumscribing the non-α-phase region
- d i :
-
diameter of the original tin alloy filament
- h:
-
surface heat transfer coefficient
- k:
-
thermal conductivity of the composite material
- P:
-
extrusion pressure
- ΔT max :
-
adiabatic temperature rise
- V R :
-
velocity of the extruded rod
References
Y. Hashimoto, K. Yoshizaki, and M. Tanaka, in Proceedings 5th Intern. Cryogenic Engineering Conference, IPC Science and Technology Press, London (1974), p. 332.
E. G. Ziurys, in Proceedings of the 5th Intern. Conference on Magnet Technology, Laboratori Nazionali del CNEN, Frascati, Italy (1975), p. 296.
J. A. Lee, C. F. Olds, and D. Larbalastier, in Physique sous Champs Magnétique Intenses, Centre National de Recherche Scientifique, Paris (1975), p. 87.
C. H. Rosner, A. Petrovich, B. A. Zeitlin, and C. D. Henning, in 6th Symposium on Engineering Problems in Fusion Research, IEEE Pub. No. 75CH1097-5-NPS, IEEE, New York (1976), p. 597.
M. Suenaga, O. Horigami, and T. S. Luhman, Appl. Phys. Lett. 25:624 (1974).
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© 1978 Springer Science+Business Media New York
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Petrovich, A., Zeitlin, B.A. (1978). Multifilamentary Nb3Sn Composites Incorporating a High-Tin Bronze. In: Timmerhaus, K.D., Reed, R.P., Clark, A.F. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 24. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9853-0_44
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DOI: https://doi.org/10.1007/978-1-4613-9853-0_44
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