国产MOCVD-YBCO带材高温超导线圈研制与磁场温度特性研究  

Development of a 4 T(46 K)100 mm high-temperature superconducting coil made of homemade MOCVD-YBCO coated conductors

作　　者：丁发柱[1,2,3] 张京业 谭运飞[4] 陈治友[4] 董泽斌[1,2,3] 张慧亮 商红静[1,2,3] 许文娟 张贺 屈飞 高召顺[1,2] 周微微[1,2] 古宏伟[1,2,3] Ding Fa-Zhu1）2）3） Zhang Jing-Ye1）2） Tan Yun-Fei4） Chen Zhi-You4） Dong Ze-Bin1）2）3） Zhang Hui-Liang1）2）3） Shang Hong-Jing1）2）3） Xu Wen-Juan1）2）3） Zhang He1）2） Qu Fei1）2） Gao Zhao-Shun1）2） Zhou Wei-Wei1）2） Gu Hong-Wei1）2）3） 1） ＊(Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China） 2） （Key Laboratory of Applied Superconductivity, Chinese Academy of Sciences, Beijing 100190, China） 3） （University of Chinese Academy of Sciences, Beijing 100049, China） 4） （High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院应用超导重点实验室,北京100190 [3]中国科学院大学,北京100049 [4]中国科学院强磁场科学中心,合肥230031

出　　处：《物理学报》2018年第6期250-257,共8页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2014AA032702);国家自然科学基金(批准号:51577180;51577181);北京市自然科学基金委面上项目(批准号:2152035);中国科学院青年创新促进会(批准号:2016128)资助的课题~~

摘　　要：超导磁体的场强与超导材料的载流能力、磁体口径和低温环境有密切关系.为了在中高温区域实现高磁场强度的超导磁体,采用国产第二代高温超导带材,成功绕制出内直径为100 mm的高温超导线圈.该超导线圈在77,65,55和46 K不同温区下进行了性能测试,其最大运行电流分别为65,147,257和338 A,对应的中心磁场强度分别为0.78,1.77,3.1和4.08 T.所研制的超导线圈的中平面上磁场基本一致.The second-generation high-temperature superconductor （2G HTS） is a good candidate for high field magnet due to its high critical temperature To, high critical current density Jc, and high irreversibility field Hirr. This paper presents the design and development of a 4.08 T （46 K） coil made of homemade 2G HTS. In order to meet the design requirement of HTS coil, the electromagnetic finite element modeling and optimization are carried out on the basis of the research of the properties of YBa2Cu3O7-x （YBCO） tapes. And the design scheme of HTS coil is completed. Then the HTS coil with an inner diameter of 100 mm is successfully constructed according to the scheme. It consists of a stack of 10 double-pancakes with the same outer diameter wound with YBCO tapes. The diameter and height of the HTS coil are 236 and 359 ram, respectively. A total of 1600 meters of YBCO tape are used to wind this HTS coil. We measure the I-V curves of superconducting coil at different cryogenic temperatures. First, liquid nitrogen is used to cool the HTS coil to 77 K, and then the temperature is reduced to 65 K by the decompression cooling method. The cooling coil containing liquid helium is used to exchange heat and cool the solid nitrogen to obtain much lower cryogenic temperature. The maximum operating currents of the HTS magnet at 77, 65, and 55 K are 65, 147, and 257 A, respectively, corresponding to the center magnetic field of 0.78, 1.77, and 3.1 T. At 46 K, the HTS coil with an inner diameter of 100 mm generates a 4.08 T field at the center. And the magnetic field of superconducting coil is basically uniform in the medium plane. The results demonstrate a strong potential of home-made YBCO magnet for direct current high-field applications.

关 键 词：高温超导磁体 钇钡铜氧带材 

分 类 号：TM26[一般工业技术—材料科学与工程]