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研究结果为该类复合制冷循环技术奠定了重要基
2022-04-20 21:40

  近日,中国科学院上海技术物理研讨所研讨员党海政课题组应用以四级高频脉冲管循环作为前级、JT循环作为终端的复合制冷循环实验计划,获取了迄今为止公开报道的基于多级高频脉冲管耦合JT的复合制冷循环实践获取的最低温度——1.36 K。

  

  在此根底上,该团队针对目前获取2 K以下温度的详细理论均需运用昂贵而稀缺的氦-3工质的缺陷,提出了以氦-4为独一工质的创新复合制冷循环计划,同时进一步结合中科院上海微系统与信息技术研讨所研讨团队,将以氦-4为独一工质的复合制冷机应用于冷却实践的超导纳米线单光子探测器(SNSPD),经过对系统探测效率和暗计数率等关键指标的实测,结果标明该制冷机能够为SNSPD提供1.84 K工作温度和良好电环境,使其坚持稳定牢靠的工作状态。

  

  以上研讨结果为该类复合制冷循环技术在将来的空间应用和进一步适用化奠定了重要根底,相关成果先后发表于Cryogenics、IEEE Transactions on Applied Superconductivity和《科学通报》上。

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