超导磁体测试用低温恒温器设计及性能分析  

Design and performance analysis of cryostat for superconducting magnet measurement

作　　者：程月 倪东升[1,3] 陈玉泉 王旭东[1,3] 王力实[1,4] 朱丽[1] 王祖军 姚庆高[1] Cheng Yue;Ni Dongsheng;Chen Yuquan;Wang Xudong;Wang Lishi;Zhu Li;Wang Zujun;Yao Qinggao(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Lanzhou University of Technology,Lanzhou 730000,China;University of Science and Technology of China,Hefei 230026,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院近代物理研究所,兰州730000 [2]兰州理工大学,兰州730000 [3]中国科学技术大学,合肥230026 [4]中国科学院大学,北京100049

出　　处：《低温与超导》2024年第12期16-20,44,共6页Cryogenics and Superconductivity

基　　金：甘肃省自然科学基金(22JR5RA117)资助。

摘　　要：本文针对“国家重点研发计划—下一代重离子加速器关键部件合作研制”项目中的关键部件快脉冲超导二极磁铁的低温测试需求,研制了一套具备迫流冷却功能的低温恒温器,包含电流引线接口箱(Feedbox)、测试杜瓦及冷却管路。通过优化冷屏涡流分布和采用POST支撑结构,有效降低了热负载并缓解了温差导致的热应力。经计算系统在77 K至4.5 K温度范围内的总漏热量约为17 W,满足低温测试要求。该研究为快脉冲超导磁体在低温条件下的性能评估提供了有力支持,并为未来低温恒温器的优化设计提供了参考。Based on the evaluation requirements for cryogenic performance of the fast-ramped superconducting dipole mag⁃net,a key component of the"National Key R&D Program—Collaborative Development of Key Components for the Next-Genera⁃tion Heavy-Ion Accelerator"project,a cryostat with forced-flow cooling capability was designed and developed.It consisted of a feedbox,a test dewar and cooling pipelines.The design was optimized by analyzing and redistributing eddy currents on the ther⁃mal shield and implementing POST support structures,which significantly reduced thermal loads and alleviated thermal stress in⁃duced by temperature gradients.Computational analysis indicates that the total heat leakage of the system is approximately 17 W within the operational temperature range of 77 K to 4.5 K,thereby meeting the stringent requirements for cryogenic testing.This research can provide a robust framework for the performance assessment of fast-ramped superconducting magnets under cryogenic conditions and serve as a reference for advancing cryostat optimization in future applications.

关 键 词：快脉冲超导磁体 低温测试 POST支撑 漏热 

分 类 号：TB661[一般工业技术—制冷工程]