【摘要】 本文从实验和理论上讨论了三根复合多芯线组成的初级超导电缆的耦合损耗，横变磁场下损耗近似表达式表明，损耗与电缆参数如复合多芯线外皮厚度，充填材料量的多少有关。无量纲特征损耗与Ｃａｍｐｂｅｌｌ理论不符合，因为后者只适用多数复合多芯线组成的电缆。更多还原

【Abstract】 An experimental and theoretical discussion on the coupling current lossesin a superconducting firet-cable of three strands is presented. Approximateexpressions for the induced loss by the application of a changing transversemagnetic field are given as the function of frist-cable parameters such asthe thickness of the outer sheath ,degree of compection or solder-filling ofthe first-cable.According to the present results, increase of the loss per unitvolume of a first-cable due to first-stage cabling is not as large as predictedby Campbell theory which is applicable only to the special type of first-cable of multi-strands.更多还原