可插拔式固氮冷却超导磁体系统研究进展  

Research development of detachable solid N cryostats for superconducting magnets

作　　者：聂兴超 罗桢 王瑞晨 蒋久福 盛荣进 马光同[1] Nie Xingchao;Luo Zhen;Wang Ruichen;Jiang Jiufu;Sheng Rongjin;Ma Guangtong(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学,牵引动力国家重点实验室,成都610031

出　　处：《低温与超导》2020年第9期42-47,67,共7页Cryogenics and Superconductivity

摘　　要：固氮作为一种典型的超导磁体制冷剂具有易制取、热容大、电绝缘性好等特点。近年来,随着用于冷却超导磁体的固氮低温系统逐步朝着便携化、轻量化的方向发展,可插拔式固氮低温容器的研究也取得一定进展。从固氮的物理特性出发,对比了常用固氮制取技术的优缺点,介绍了几种典型的可插拔式固氮低温容器的研究进展,并且对其可插拔结构、固氮降温性能进行了分析。此外,还分析了混合制冷剂以及导冷结构对于改善固氮冷却的超导磁体稳定性的影响。通过对比几种典型可插拔式固氮低温容器的优缺点,总结了不同插拔结构的应用工况,并且对其发展方向提出了展望。As one of the typical refrigerants for superconducting magnets,solid nitrogen(SN2)is of great merits of easy preparation,large heat capacity,good electrical insulation and so on.In recent years,detachable SN2cryostats have attracted wide interest due to the trend of portability and light weight for SN2cooling system.Based on the physical characteristics of SN2,the frequently-used production technologies of SN2were summarized,mainly analyzed the research development of several typical detachable SN2 cryostats,its detachable structures and cooling performance.In addition,the effects of mixed refrigerants and cooling structures on the thermal stability of SN2 cooled superconducting magnets were also analyzed.Finally,by comparing the advantages and disadvantages of several typical detachable SN2 cryostats,the applications of different detachable structures were summarized,and its development prospects were predicted.

关 键 词：可插拔式固氮低温系统 超导磁体 热稳定性 

分 类 号：O514.1[理学—低温物理]