【摘要】 从稳定性和交流损耗的观点阐述了脉冲磁体所用多芯超导复合线之主要参数（芯线直径d、复合线直径D和拧扭距l_p）的设计方法.设计并研制了两种cu-CuNi-NbTi三组元多芯复合线,其母材横向平均有效电阻率和NbTi芯径分别约为2×10^-6Q.cm,10 μm和2×10^-7Q.cm,6μm.讨论了复合线冶金工艺,特别是挤压温度对拉制NbTi细芯的影响.报道了复合线短样超导临界电流密度及其小型磁体的励磁性能.更多还原

【Abstract】 From the viewpoint of stability and ac loss, the design method of the main parameters (filament diameter d, composite diameter D and twist pitch lp) of the multi-filamentary superconducting composite for a pulsed magnet is described. Applying this method, two kinds of Cu-CuNi-NbTi three-component multifilamentary composites, of which the average transverse effective resistivities of matrix and NbTi filament diameters are about 2×10-6Ω·cm, 10μm and 2×10-7Ω·cm, 6μm respectively, have been successfully fabricated. The effects of the metallurgical processing, especially the effect of extruding temperature on the drawing of such extra-fine NbTi filaments are discussed. Jc of short samples of the composites and the exciting properties of the small magnets of such composites are also reported.更多还原