DocumentCode :
944209
Title :
Instability of NbTi/CuNi superconducting wires
Author :
Tsuda, M. ; Takamatsu, H. ; Ishiyama, A.
Author_Institution :
Dept. of Electr. Eng., Waseda Univ., Tokyo, Japan
Volume :
3
Issue :
1
fYear :
1993
fDate :
3/1/1993 12:00:00 AM
Firstpage :
503
Lastpage :
506
Abstract :
The quench current degradation in multifilamentary NbTi superconducting wires with a CuNi matrix have been measured and analyzed by the finite-element method. The authors measured the degradation of the quench current as a function of the current sweep rate in the range of 10 A/s to 100 kA/s, and the initial current, which was a transport current just before current changing. Experimental data are compared with analytical results taking the magnetic and the thermal diffusion in the radial direction of wire cross-section into account. From these comparisons, the relation between the rate of current changing and the degradation of the quench current in superconducting wires is discussed.<>
Keywords :
composite superconductors; copper alloys; critical currents; finite element analysis; nickel alloys; niobium alloys; quenching (thermal); superconducting magnets; titanium alloys; type II superconductors; CuNi matrix; NbTi-CuNi superconducting wire instability; analytical method; critical current; current sweep rate; finite-element method; magnetic diffusion; multifilamentary NbTi superconducting wires; normal zone propagation velocity; quench current degradation; thermal diffusion; transport current; two-strand cable; wire cross-section; Degradation; Electric resistance; Magnetic analysis; Magnetic flux; Niobium compounds; Superconducting cables; Superconducting filaments and wires; Temperature; Thermal conductivity; Titanium compounds;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.233753
Filename :
233753
Link To Document :
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