铝稳定体卢瑟福缆剩余电阻率的测量
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摘要
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.
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.
引文
1王贻芳.建设大型加速器实现科学梦[J].现代物理知识,2014(2):29-31.Wang Yifang. Building a large accelerator realize the scientific dream[J]. Modern Physics,2014(2):29-31.
2 刘宏伟,余运佳,王秋良,等.铝稳定的制冷机冷却的超导磁体稳定性分析[J].电工电能新技术,2005(1):65-68.Liu Hongwei,Yu Yunjia,Wang Qiuliang,et al. Stability analysis for cryocooled aluminum stabilized superconducting magnet[J]. Advanced Technology of Electrical Engineering and Energy,2005(1):65-68.
3 华崇远,邓廷璋. NbTi复合超导线剩余电阻比(RRR)测定国际标准制定中若干问题的实验探讨[J].低温物理学报,1997(6):420-426.Hua Chongyuan,Deng Tingzhang. Discussion about several issues were in the international standards for testing residual resistivity ratio of the compositing superconducting wire Nb Ti[J]. Journal of Low Temperature Physics,1997(6):420-426.
4 刘云峰.超导铌材剩余电阻率的测量[J].宁夏工程技术,2012,11(2):148-150.Liu Yunfeng. Measurement of residual resistivity of superconducting niobium cable material[J]. Ningxia Engineering Technology,2012,11(2):148-150.
5 倪泳明.涡流法测量金属样品电阻率[J].低温物理,1981(2):139-143.Ni Yongming. The resistivity measurement for metal samples based on eddy current method[J]. Low Temperature Physics,1981(2):139-143.
6 华崇远.用测定剩余电阻比确定高纯金属中杂质的含量和分布[J].稀有金属,1987(2):48-51.Hua Chongyuan. Determining the content and distribution of impurities in high purity metal through testing residual resistivity ratio[J]. Rare Metal,1987(2):48-51.
7 袁冠森,Hartwig K T.纯铝在4. 2K下周期应变后强度和电阻的变化[J].稀有金属,1990(1):13-15.Yuan Guanlin,Hartwig K T. Change of strength and resistance of pure aluminum after periodic strain at 4. 2K[J]. Rare Metal,1987(2):48-51.
8 Matsushita T,Otabe E S,Murase S,et al. Results of Round Robin Test of Residual Resistance Ratio in Cu/Nb-Ti Composite Superconductor[M]. Advances in Superconductivity XI. Springer Japan,1999:1507-1510.
9 Hua C Y,Harper J,Hartwig K T. Resistivity and RRR measurements on grooved SMES aluminum stabilizer bar by the eddy current decay Method[J]. Advances in Cryogenic Engineering Materials,1994,(40):669-675.
10 Hartwig K T,Zou H. Residual Resistivity Measurements on High RRR Aluminum by the Eddy Current Decay Method[M]. Advances in Cryogenic Engineering Materials. Springer US,1994.
11 牟智慧. CEPC探测器超导磁体铝稳定体卢瑟福超导电缆性能的初步研究[D].北京:中国科学院高能物理研究所,2017.Mu Zhihui. Preliminary study on the properties of aluminum-stabilized rutherford superconducting cables in the CEPC detector magnet[D].Beijing:Institute of High Energy Physics,Chinese Academy of Sciences,2017.
2 刘宏伟,余运佳,王秋良,等.铝稳定的制冷机冷却的超导磁体稳定性分析[J].电工电能新技术,2005(1):65-68.Liu Hongwei,Yu Yunjia,Wang Qiuliang,et al. Stability analysis for cryocooled aluminum stabilized superconducting magnet[J]. Advanced Technology of Electrical Engineering and Energy,2005(1):65-68.
3 华崇远,邓廷璋. NbTi复合超导线剩余电阻比(RRR)测定国际标准制定中若干问题的实验探讨[J].低温物理学报,1997(6):420-426.Hua Chongyuan,Deng Tingzhang. Discussion about several issues were in the international standards for testing residual resistivity ratio of the compositing superconducting wire Nb Ti[J]. Journal of Low Temperature Physics,1997(6):420-426.
4 刘云峰.超导铌材剩余电阻率的测量[J].宁夏工程技术,2012,11(2):148-150.Liu Yunfeng. Measurement of residual resistivity of superconducting niobium cable material[J]. Ningxia Engineering Technology,2012,11(2):148-150.
5 倪泳明.涡流法测量金属样品电阻率[J].低温物理,1981(2):139-143.Ni Yongming. The resistivity measurement for metal samples based on eddy current method[J]. Low Temperature Physics,1981(2):139-143.
6 华崇远.用测定剩余电阻比确定高纯金属中杂质的含量和分布[J].稀有金属,1987(2):48-51.Hua Chongyuan. Determining the content and distribution of impurities in high purity metal through testing residual resistivity ratio[J]. Rare Metal,1987(2):48-51.
7 袁冠森,Hartwig K T.纯铝在4. 2K下周期应变后强度和电阻的变化[J].稀有金属,1990(1):13-15.Yuan Guanlin,Hartwig K T. Change of strength and resistance of pure aluminum after periodic strain at 4. 2K[J]. Rare Metal,1987(2):48-51.
8 Matsushita T,Otabe E S,Murase S,et al. Results of Round Robin Test of Residual Resistance Ratio in Cu/Nb-Ti Composite Superconductor[M]. Advances in Superconductivity XI. Springer Japan,1999:1507-1510.
9 Hua C Y,Harper J,Hartwig K T. Resistivity and RRR measurements on grooved SMES aluminum stabilizer bar by the eddy current decay Method[J]. Advances in Cryogenic Engineering Materials,1994,(40):669-675.
10 Hartwig K T,Zou H. Residual Resistivity Measurements on High RRR Aluminum by the Eddy Current Decay Method[M]. Advances in Cryogenic Engineering Materials. Springer US,1994.
11 牟智慧. CEPC探测器超导磁体铝稳定体卢瑟福超导电缆性能的初步研究[D].北京:中国科学院高能物理研究所,2017.Mu Zhihui. Preliminary study on the properties of aluminum-stabilized rutherford superconducting cables in the CEPC detector magnet[D].Beijing:Institute of High Energy Physics,Chinese Academy of Sciences,2017.