铝稳定体卢瑟福缆剩余电阻率的测量

Measurement of residual resistivity ratio of aluminum-stabilized rutherford cable

介绍了铝稳定体卢瑟福缆的测量背景。对比了目前测量金属剩余电阻率的3种方法,确定测量电缆使用定点法和曲线法。通过实验,得出国产化的铝稳定体卢瑟福缆中,铝的剩余电阻率为380,制作超导线所用高纯铜的剩余电阻率(RRR,Residual Resistance Ratio)值为256,未绞缆的NbTi/Cu超导线的RRR值为177,绞缆后超导线的RRR值为110,比未绞缆的超导线RRR值降低了67,而覆铝后超导线的RRR值会增加到220。超导线的RRR值已达要求,而铝的RRR值还比较低,与国际领先水平还有较大差距,下一步的重点是改进覆铝工艺,以提升其RRR值。

The measuring background of the aluminum-stabilizer rutherford cable is introduced. The existing residual resistivity test methods are compared,the RRR（ Residual Resistance Ratio） of the cable is measured by the fixed temperature method and the curve method. Through experiments,the RRR of domestically produced aluminum stabilizer rutherford cable was obtained. The test results show that the RRR of high purity aluminium and high pure copper are 380 and 256,respectively. The twisting NbTi/Cu superconductors have a RRR of 110,with a 67 decrease compared to the original cable,which RRR is 177. The RRR of Aluminum covered twisting cable is 220. The RRR of the superconducting wire has reached the requirement,while the RRR of the aluminum is still relatively low,there is still a big gap with the international advanced level.The next step is to improve the aluminum cladding process to increase its RRR value.