DocumentCode :
81120
Title :
Study of Low Loss Experimental Superconducting Nb-Ti Wires to be used in FAIR Magnets
Author :
Karasev, Yu.V. ; Potanina, L.V. ; Salunin, N.I. ; Pantsyrny, V.I. ; Gubkin, I.N. ; Malchenkov, A.V. ; Polikarpova, M.V. ; Abdyukhanov, I.M. ; Voloshin, I.F. ; Kalinov, A.V.
Author_Institution :
JSC A. A. Bochvar High-Technol. Res. Inst. of Inorg. Mater., Moscow, Russia
Volume :
25
Issue :
3
fYear :
2015
fDate :
Jun-15
Firstpage :
1
Lastpage :
5
Abstract :
For the effective operation of the Facility for Antiproton and Ion Research (FAIR) magnet system, a new class of superconducting wires with high current carrying capacity and low energy losses is needed. Special requirements are formulated to the wires for this application. Diameter of Nb-Ti filaments has to be about 3 \\mumbox{m} , critical current density boldsymbol{J}_{c} has to be above 4500 A/mm2 (at 2 T; 4.2 K) and filament twist pitch should be as small as possible without a degradation of critical current density. These wires with small filaments should contain a resistive (Cu-0.5%Mn) inter-filament matrix to reduce inter-filament coupling current losses and OF copper outside and inside the filamentary region to provide required stabilization. The comparative study of low losses superconducting Nb-Ti wires of different designs was performed. These experimental wires intended for use in FAIR model magnets were fabricated by double stacking method. The experimental Nb-Ti wires conform to the abovementioned requirements. This paper presents current characteristics, hysteresis losses and other properties of experimental low losses Nb-Ti wires. The benefits of each design are discussed.
Keywords :
critical current density (superconductivity); multifilamentary superconductors; niobium alloys; superconducting magnets; titanium alloys; FAIR magnet system; Nb-Ti filament diameter; NbTi; critical current density; current carrying capacity; double stacking method; energy losses; filament twist pitch; filamentary region; hysteresis losses; interfilament coupling current losses; low loss superconducting Nb-Ti wires; resistive interfilament matrix; temperature 4.2 K; Copper; Critical current density (superconductivity); Magnetic hysteresis; Stacking; Superconducting filaments and wires; Superconducting magnets; Wires; Fabrication; fabrication; low losses; superconducting materials; wire;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2015.2402754
Filename :
7050281
Link To Document :
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