中子散射单发式氦三制冷技术及控温研究  

Single-shot 3He refrigeration technology for neutron scattering and temperature control study

作　　者：胡海韬[1,2,3] 白波 袁宝[1,2] 段钰锋 罗万居[1,2] 黄志强 林权 张绍英 童欣 Hu Haitao;Bai Bo;Yuan Bao;Duan Yufeng;Luo Wanju;Huang Zhiqiang;Lin Quan;Zhang Shaoying;Tong Xin(Institute of High Energy Physics, Chinese Academy of Sciences,Beijing 100049, China;Spallation Neutron Source Science Center, Dongguan 523803, China;Key Laboratory of Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]散裂中子源科学中心,东莞523808 [3]东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室,南京210096 [4]中国科学院物理研究所,北京100190

出　　处：《低温工程》2019年第5期10-13,52,共5页Cryogenics

基　　金：国家自然科学基金面上项目(11875265);中科院重大科研仪器研制项目(科发条财函字[2018]284号);中国科学院率先行动“百人计划”学术帅才项目(人字[2018]53号)

摘　　要：为了拓宽中国散裂中子源(CSNS)的应用领域和测量样品类型,CSNS一期工程建设了单发式氦三极低温制冷机,其样品座最低温度可达到300 mK以下,对单发式氦三极低温制冷机的工作原理进行了详细介绍,并阐述了CSNS氦三极低温插件的内部结构、降温测试、控温研究及实验测试结果,通过改进控温模式,实现了在样品座温度所稳定的时间范围内,控温精度提高到±3 mK的高精度控制。In order to widen the application field of China spallation neutron source(CSNS) and sample types, a single shot 3 He refrigerator has been constructed in the first phase of CSNS project. The lowest temperature of the sample holder can be below 300 mK. The working principle of the single shot 3 He refrigerator is introduced in detail. The structure, cooling test, temperature control research and experimental test results of the CSNS single shot 3 He refrigerator are introduced. By improving the temperature control mode, the precision of temperature control can be improved to ±3 mK within the stable time range of sample base temperature.

关 键 词：中子散射 氦三制冷 极低温 控温 

分 类 号：TB651[一般工业技术—制冷工程]