Enhanced proximity effect coupling due to the presence of a Nb barrier in fine NbTi multifilamentary composites
- Ohio State Univ., Columbus, OH (United States)
- IGC Advanced Superconductors Inc., Waterbury, CT (United States)
Recent measurements have shown that hydro-extruded fine-filament multifilamentary NbTi/Cu composite (MF) strands in which the NbTi filaments were not protected by Nb barriers exhibited extremely low proximity effect (PE) coupling. To examine this anomaly two series of MF strands were fabricated, one with and the other without the Nb barrier. Magnetization measurements performed on these strands confirmed that the presence of the Nb barrier was associated with an enhancement of the PE coupling. It is concluded that any additions to the matrix of a MF strand that would provide the needed protection against Cu/NbTi interface compound formation, without requiring the use of Nb as a barrier, can be expected to lower the tendency for PE coupling.
- DOE Contract Number:
- FG02-95ER40900
- OSTI ID:
- 482132
- Report Number(s):
- CONF-950722-; ISSN 0065-2482; TRN: 97:010613
- Journal Information:
- Advances in Cryogenic Engineering, Vol. 42B; Conference: CEC/ICMC `95: cryogenic engineering conference and international cryogenic materials conference, Columbus, OH (United States), 17-21 Jul 1995; Other Information: PBD: 1997
- Country of Publication:
- United States
- Language:
- English
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