TY - JOUR
T1 - Bi-Sr-Ca-Cu-O conductors and magnets at high stress-strain levels
AU - Weijers, H. W.
AU - Yoo, J. M.
AU - Ten Haken, B.
AU - Schwartz, J.
N1 - Funding Information:
Research supported in part by the NSF and the State of Florida under cooperative grant DMR 9527035. We thank Hans van Eck and Youri Viouchkov for technical support.
PY - 2001/9
Y1 - 2001/9
N2 - 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.
AB - 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.
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U2 - 10.1016/S0921-4534(01)00472-5
DO - 10.1016/S0921-4534(01)00472-5
M3 - Article
AN - SCOPUS:0035451511
VL - 357-360
SP - 1160
EP - 1164
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
ER -