NDLI: Magnetic instability of AC multifilamentary wire due to transport current and its dependence on phase of external AC magnetic field

Content Provider	IEEE Xplore Digital Library
Author	Fukui, S. Ito, M. Tsukamoto, O. Amemiya, N.
Copyright Year	2002
Abstract	We performed AC quench current tests of AC superconducting multifilamentary NbTi and Nb/sub 3/Sn wires in AC external field by changing the phase difference between the transport current and the external field. The Nb/sub 3/Sn AC wire was more stable than the NbTi wire and the peak value of the AC quench currents reached to the levels of the DC quench current while the quench current of the NbTi wire was much less than the DC quench current. The data also showed strong dependence of the quench currents on the phase difference. We made a theoretical model to analyze the stability of AC wire assuming that the instability was caused by the magnetic instability due to the transport currents. In the analysis, the wire temperature was numerically evaluated by calculating instantaneous AC losses and solving the thermal equilibrium equation. The quench current was estimated. In the paper, the experimental results are compared with theoretical ones and it is shown that the theoretical model explains AC quench behaviors of the wire subject to the external AC magnetic field.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	227
Ending Page	230
Page Count	4
File Size	444666
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Niobium compounds Titanium compounds Superconducting magnets Tin Magnetic analysis Performance evaluation Testing Multifilamentary superconductors Superconducting filaments and wires Stability analysis
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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