12T/70mm高场超导磁体及其低漏热杜瓦装置研制  

Development of 12T/70mm superconducting magnet and its Dewar with low heat-leak

作　　者：董帅[1,2] 俞雷 黄鹏程 王晓琦[3] 庞玉春 郁欢强[4] 章学华 陈文革[1] Dong Shuai;Yu Lei;Huang Pengcheng;Wang Xiaoqi;Pang Yuchun;Yu Huanqiang;Zhang Xuehua;Chen Wen'ge(High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Jiangsu Baosheng Group Limited Company,Baoying 225800,China;Anhui Vacree Technologies Limited Company,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究院强磁场科学中心,合肥230031 [2]中国科学技术大学,合肥230026 [3]江苏宝胜集团有限公司,宝应225800 [4]安徽万瑞冷电科技有限公司,合肥230094

出　　处：《低温与超导》2021年第9期14-19,共6页Cryogenics and Superconductivity

基　　金：中国科学院合肥大科学中心重点研发项目(2019HSC-KPRD002)资助。

摘　　要：中国科学院强磁场科学中心研制出一套中心孔径70 mm、中心场强达12 T的超导磁体系统,该系统与扫描隧道显微镜(Scanning Tunneling Microscopy,简称STM)设备相结合,为测试样品提供低温、高场的环境。该超导主磁体是由内外同轴的两个线圈组合而成。内部为Nb3 Sn线圈而外部为NbTi线圈,它们分别在4.2 K的温度下可提供5.32 T和6.68 T中心磁场强度。此外,该系统的低温杜瓦通过优化设计和结构改进,液氦温区的漏热为0.178 W,满足了用户超低漏热要求。A superconducting magnet system with a bore of 70mm and a central field of 12 T was built at High Magnetic Field Laboratory,Chinese Academy of Sciences(CHMFL).This system was combined with Scanning Tunneling Microscopy(STM)equipment to provide a low-temperature and high-field environment for test samples.In the system,the superconducting magnet was composed of two coaxial coils:the insert was a Nb3 Sn coil and the outsert was a NbTi coil,which could provide 5.32 T and 6.68 T central magnetic fields at 4.2 K,respectively.In addition,a cryogenic Dewar was developed by optimal design and structural improvement,and the heat leakage of Dewar was 0.178 W at 4.2 K,which could meet the user's ultra-low heat leakage requirement.

关 键 词：12T/70mm 超导磁体 低漏热 低温杜瓦 

分 类 号：TM265[一般工业技术—材料科学与工程]