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In order to clarify effect of utilizing a Nb rich CuNb reinforment on superconducting stability, r-z two-dimensional time-dependent numerical simulations on composite CuNb/Nb 3 Sn wires are conducted. The time variations of temperature and current density distributions, minimum quench energy (MQE), and normal zone propagation velocity (v p ) of a Cu-17vol%Nb/Nb 3 Sn wire, a...
For a high field tokamak device, we have developed force-balanced coils (FBCs) which have nonuniform-pitch multi-pole helical-configuration to reduce centering electromagnetic forces without using cancellation coils. As a superconductivity magnet, the FBC configuration is favorable to the achievement of high critical current densities because of a J c B effect. In the tokamak operation with...
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