随着超导及强磁场技术在科学研究领域和国民经济中的地位及作用越来越突出，Nb3Sn管内电缆超导导体（CICC）由于独特的结构和性能上的优势成为高场磁体首选导体，具有重要的研究价值。交流损耗作为Nb3Sn CICC导体特有的属性，随着Nb3Sn CICC导体性能的提高，成为超导磁体安全运行的巨大危害，是高性能Nb3Sn CICC导体研究的热点之一。本项目主要针对Nb3Sn CICC导体独特的交流特性及国际上在此领域的发展趋势和研究不足，主要开展以下两个项目研究：1. 不同磁场区间及应变条件下Nb3Sn导体磁化机理及磁滞损耗研究；2. 电磁负载及循环对Nb3Sn CICC导体耦合损耗机理研究。通过理论模拟拟合和实验相结合的方法，对影响高性能Nb3Sn CICC导体安全运行的磁滞及耦合损耗机理的关键问题进行系统的分析研究，提高我国高场超导技术的整体研究水平。

With the more and more important role in the scientific research and national economy, high performance Nb3Sn Cable in Conduit Conductor (CICC) becomes the preferred conductor because of the the uique performance advantages and the important research With the more and more important role in the scientific research and national economy, high performance Nb3Sn Cable in Conduit Conductor (CICC) becomes the preferred conductor in superconducting technology and high field region because of the the uique performance advantages and the important research value. The AC losses of Nb3Sn CICC as a particular attribution brings the great harm for safe operation and has become one of the research hot pot in high performance Nb3Sn CICC area. This project mainly carries out the following two research contents based on the unique attibution and shortage in this research field presently: 1. Magnetiztion mechanism and hysteresis losses research of Nb3Sn CICC in different magnetic field and strain condition; 2. Study on Nb3Sn CICC coupling losses due to electromagnetic force load and circles. A detailed analysis and research on the magnetization and coupling mechanism affecting the safe operation of high performance Nb3Sn CICC is carried out which can improve the overall research level on superconducting technology in our country.