Premium
Development of high‐J c NbTi multifilamentary superconducting wire with Nb artificial pins for AC applications
Author(s) -
Miura Osuke,
Inoue Itaru,
Matsumoto Kaname,
Tanaka Yasuzo
Publication year - 1996
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391160301
Subject(s) - materials science , superconductivity , superconducting wire , critical current , magnet , condensed matter physics , superconducting magnet , magnetic field , current density , electrical engineering , physics , quantum mechanics , engineering
High critical current densities of 1.61 × 10 10 A/m 2 at 1 T, 6.1 × 10 9 A/m 2 at 3 T and 2.9 × 10 9 A/m 2 at 5 T were achieved by controlling the distribution of Nb artificial pins in NbTi multifilamentary superconducting wires for ac applications. The critical current densities attained are over two times higher than those of conventional ac superconducting wires. This increase can be attributed to the shift of the peak of pinning force density to higher magnetic field by optimizing the pinning parameters. The benefits of increasing critical current densities for ac applications are demonstrated. A 2.5 T/100 kVA ac superconducting magnet was designed and made by using high J c wire with controlled distribution of Nb artificial pins. Compared with conventional ac superconducting magnets, the new magnet exhibits a drastic decrease in size as well as in ac losses.