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作 者:刘旭明 潘长钊 张宇 廖奕 郭伟杰 俞大鹏 Liu Xu-Ming;Pan Chang-Zhao;Zhang Yu;Liao Yi;Guo Wei-Jie;Yu Da-Peng(Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China;International Quantum Academy,Shenzhen 518048,China)
机构地区:[1]南方科技大学量子科学与工程研究院,深圳518055 [2]深圳国际量子研究院,深圳518048
出 处:《物理学报》2023年第19期70-77,共8页Acta Physica Sinica
基 金:深圳市优秀科技创新人才计划(博士启动)项目(批准号:RCBS20221008093120048)资助的课题。
摘 要:液氦温区GM型脉冲管制冷机由于具有大冷量、低振动、高可靠性等优点,在凝聚态物理、量子计算等前沿领域具有重要应用.调相机构对脉冲管制冷机性能有重要影响,先前针对GM型脉冲管制冷机调相机构的研究,主要集中在制冷机获取液氦温度后单个调相元件对制冷性能的影响方面.本文围绕4 K GM型脉冲管制冷机,基于Sage软件设计并构建了气耦合两级结构的整机仿真模型,分析了一、二级小孔和一、二级双向分别对两级制冷温度的影响,研究了制冷机达到液氦温区温度的调节优化过程.在此基础上,搭建了实验系统,实验样机经优化最低温度可达3.1 K,并可在4.2 K提供0.8 W制冷量.该研究不仅可以推进4 K制冷平台国产化进程,对相关前沿基础科学研究和重要科学仪器设备的自主研制也有支撑作用.Owing to the advantages of large cooling capacity,low vibration and high reliability,GM-type pulse tube cryocoolers at liquid helium temperature have important applications in frontier fields of condensed matter physics research,quantum computing,etc.The phase shifter has an important influence on the cooling performance of pulse tube cryocooler.Previous researches on the phase shifter of GM-type pulse tube cryocooler mainly focused on the effect of a single phase shifter on the performance of the cryocooler at liquid helium temperature.In this paper,based on Sage software,a simulation model of a 4 K two-stage gas-coupled GM-type pulse tube cryocooler is first designed and constructed.The influence of the phase shifters of the two stages on the first-stage and the second-stage temperatures are calculated.The adjustment and optimization process of the cryocooler to obtain the liquid helium temperature is studied.Numerical simulations are given below.1)The lowest temperature of the model is only about 100 K when the phase shifters of the two stages are closed.The lowest temperature of the model can be reduced to 2.7 K by optimizing the first-stage orifice valve,the second-stage orifice valve,the first-stage double-inlet valve and the second-stage double-inlet valve in sequence.2)The first-stage orifice valve,the second-stage orifice valve,and the second-stage double-inlet valve have a significant effect on reducing the cooling temperature of the second stage,while the first-stage doubleinlet valve has little effect on reducing the temperature of the second stage.3)The first-stage orifice valve and the second-stage double-inlet valve have a significant effect on reducing the cooling temperature of the first stage,and the first-stage double-inlet valve has little effect on reducing the temperature of the first stage.The secondstage orifice valve will worsen the first stage performance.Finally,an experimental system is constructed.The lowest temperature of the experimental prototype can reach 3.1 K,and the cooling cap
分 类 号:TB651[一般工业技术—制冷工程]
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