Development of an Nb{sub 3}Sn AC coil with react and wind method

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.511475· OSTI ID:287729

Kasahara, H; Torii, S; Akita, S ^[1]; Kubota, Y; Yasohama, K; Kobayashi, H; Ogasawara, T ^[2]; Kumano, T; Miyake, S ^[3]

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1. CRIEPI, Tokyo (Japan)
2. Nihon Univ., Tokyo (Japan)
3. Showa Electric Wire and Cable Co., Ltd., Kanagawa (Japan)

The Nb{sub 3}Sn superconductor possesses a higher critical temperature than the NbTi strand. Therefore, it is now possible to make highly stable superconducting strands. The authors examined the manufacturing process of AC Nb{sub 3}Sn strands. The internal Sn diffusion process showed a higher critical current density than the conventional process. Nb{sub 3}Sn strands for AC use have a high Jc with low temperature reaction heat treatment, because they have fine filaments to decrease AC loss. They made a 400kVA class superconducting coil using the developed Nb{sub 3}Sn cable with the React and Wind method. The loss density of this coil was 25.7MW/m{sup 3} at the point just before the quench. In this case, the temperature of the cable increases about 3.39K. This means that the coil using Nb{sub 3}Sn cables has a very high stability in AC use.

• OSTI ID: 287729
• Report Number(s): CONF-950691--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRITICAL CURRENT
CURRENT DENSITY
ELECTRIC CONDUCTORS
ENERGY LOSSES
FABRICATION
MANUFACTURING
NIOBIUM BASE ALLOYS
SUPERCONDUCTING CABLES
SUPERCONDUCTING COILS
TIN ALLOYS
TRANSITION TEMPERATURE