Bi-Sr-Ca-Cu-O conductors and magnets at high stress-strain levels

H.W. Weijers, J.M. Yoo, Bernard ten Haken, J. Schwartz

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We focus on a react and wind Bi-2223 conductor with a pure silver matrix. The stress–strain–critical current relation is determined for coils with a uniform stress distribution, at 4.2 K and 19 T. Somewhat surprisingly, the coils fail at a Lorentz force induced strain value close to the value for uni-axially loaded straight samples. This implies that bending strain is only partially retained due to the plastic nature of the pure silver matrix. Also, a double-pancake coil with a 15 mm winding thickness, resulting in a non-uniform stress distribution, is tested at 4.2 K and 19 T. The coil current is cycled with increasing peak values and the onset and evolution of critical current degradation in the coil is shown.
Original languageEnglish
Pages (from-to)1160-1164
Number of pages5
JournalPhysica C
Issue numberPart 2
Publication statusPublished - 2001
Event13th International Symposium on Superconductivity, ISS 2000 - Nihon Toshi Center Kaikan, Tokyo, Japan
Duration: 14 Oct 200016 Oct 2000
Conference number: 13


  • Lorentz force
  • Bi-2223


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