4 K high frequency pulse tube cryocooler used for terahertz space application
4 K high frequency pulse tube cryocooler used for terahertz space application
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DOI：
10.1007/s11434-014-0457-5
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发表时间：
2014-06
影响因子：
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通讯作者：
J. Quan;Yanjie Liu;Dong Liu;Kun Zhang;Jingtao Liang;Jing Li;Q. Yao;S. Shi
中科院分区：
文献类型：
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作者：
J. Quan;Yanjie Liu;Dong Liu;Kun Zhang;Jingtao Liang;Jing Li;Q. Yao;S. Shi
太赫兹（THz）频段是射电天文和大气科学研究的重要频段，定义为0.1 ~ 10 THz。中国科学院紫金山天文台（PMO）研制的用于太赫兹探测的NbN超导体-绝缘体-超导体（SIS）混频器工作在8-10 K温度范围内，需要微振动条件，其在航天天文观测中的应用受到制冷方式的限制。中国科学院物理与化学技术研究所空间能量转换技术重点实验室研制的4K高频脉冲管制冷机为SIS混频器的应用提供了契机。本文介绍了TIPC研制的两级高频脉冲管制冷机的进展。该制冷机的空载温度达到了4.5K，这是迄今为止报道的这种制冷机的最低温度。太赫兹分量与高频脉冲管制冷机的成功耦合为太赫兹波段空间探测奠定了坚实的基础。
Terahertz (THz) frequency region, defined from 0.1 to 10 THz, is an important frequency band for radio astronomy and atmospheric science. As NbN Superconductor-Insulator-Superconductor (SIS) mixers used for terahertz detection, which are studied by the Purple Mountain Observatory (PMO), Chinese Academy of Sciences (CAS), work at 8–10 K, and require condition of micro vibrations, its astronomical observation in aerospace is limited by suitable refrigeration method. 4 K high frequency pulse tube cryocooler developed by Key Laboratory of Space Energy Conversion Technologies (SECT), Technical Institute of Physics and Chemistry (TIPC), CAS, offers an opportunity for the application of SIS mixers. This article introduces the progress of the two-stage high frequency pulse tube cryocooler researched by TIPC. The cryocooler has reached a no load temperature of 4.5 K which is the lowest temperature for this kind of cryocooler reported so far. The successful coupling between the THz component and the high frequency pulse tube cryocooler lays a solid foundation for space detection in the terahertz band.