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Development of Bi-2212/Ag round-shaped wire and magnet application

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Recent achievements in the newly-developed Bi-2212/Ag round-shaped wire with tape-shaped multifilaments are summarized. The new round-shaped wire includes 126-1320 tape-shaped filaments with triple rotation symmetry, having a good crystal alignment of Bi-2212 in each filament. We refer to the new wire as ROSATwire, (ROtation-Symmetric Arranged Tape-in-tube wire). The ROSATwire fabrication process markedly improved productivity and lowered the cost, and also improved the transport Jcof the wire. The Icand Jcreached values greater than 340 A and 1000 A mm-2, respectively, at 28 T and 4 K. Insulated wires of over 400 m length, 2 mm in diameter, are now available and ready for magnet winding. Several solenoid magnets with a 130-160 mm outer diameter and 100-600 mm height are now under fabrication.

Document Type: Miscellaneous

Publication date: January 1, 2000


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