40 T混合磁体冷屏热分析及测试  

Thermal analysis and test of 40 T hybrid magnet thermal shield

作　　者：张帅[1,2] 欧阳峥嵘[1] 李俊杰[1] 孟秋敏[1,2] Zhang Shuai;Ouyang Zhengrong;Li Junjie;Meng Qiumin(High Magnetic Field Laboratory of the Chinese Academy of Sciences ,Hefei 230031 ,China;University of Science and Technology of China, Hefei 230026, China)

机构地区：[1]中国科学院强磁场科学中心,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《低温工程》2018年第3期14-17,23,共5页Cryogenics

摘　　要：由中国科学院强磁场科学中心承建的40 T混合磁体装置由外超导磁体与内水冷磁体组成,在超导磁体杜瓦与超导线圈之间设置液氮冷屏。介绍了冷屏结构及冷却流程,并对冷屏热负荷进行了理论计算。对冷屏进行了降温测试,高场下稳定性测试及冷屏热负荷的测定。测试结果表明,冷屏满足降温要求,并可在高场下工作。就冷屏测试结果进行了分析,分析结果可用于冷屏设计及冷屏热负荷计算。The 40 T hybrid magnet,which is composed of the outsert superconducting magnet and the insert water cooled resistant magnet,has been manufactured in High Magnetic Field Laboratory（ HMFL）,Chinese Academy of Sciences. The thermal shield cooled by liquid nitrogen（ LN2） is settled between the superconducting magnet coils and the superconducting magnet dewar. The thermal shield should be tested to ensure that it can be cooled down and operated steadily in high magnetic field. The structure of the shield and the cooling process are introduced. And the theoretical calculation of the thermal shield heat load is presented. The cooling test and the stability test in high magnetic field of the thermal shield have been performed. And the heat load of the shield has been measured. The test results show that the thermal shield meets the cooling requirements and can be operated in high magnetic field environment. The thermal shield test results are analyzed,and the analysis results will make contributes to the design and heat load calculation of the thermal shield.

关 键 词：40T混合磁体 冷屏 测试 

分 类 号：TB66[一般工业技术—制冷工程]