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| 1 | 4 K high frequency pulse tube cryocooler used for terahertz space application显示文摘Terahertz(THz) frequency region, defined from0.1 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. | Jia Quan Yanjie Liu Dong Liu Kun Zhang Jingtao Liang Jing Li Qijun Yao Shengcai Shi | 2014 | Chinese Science Bulletin2014，59，27： | 12 |
| 2 | 液氢温区高频脉冲管制冷机蓄冷器研究显示文摘液氢温区制冷机蓄冷器材料的选择对制冷机的性能具有重要的影响。本文开展了液氢温区低温蓄冷材料的实验研究,系统研究了Pb球、Er_3Ni、HoCu_2、高目数不锈钢丝网等多种蓄冷材料对高频脉冲管制冷机的影响。实验测试结果表明,不锈钢丝网的实验效果仍为最佳;而Er_3 Ni的实验效果接近不锈钢丝网;Pb球作为几种蓄冷材料中比热容最高的材料,实验结果却是最差的;本文对此实验现象进行了分析和解释,以便为高频制冷机中蓄冷器材料的选择提供有益的指导和帮助。 | 周强 陈六彪 金海 朱文秀 周远 王俊杰 | 2014 | 工程热物理学报2014，35，11： | 1 |
| 3 | 回热材料Gd_2O_2S在液氦温区高频脉管制冷机的实验研究显示文摘液氦温区高频脉冲管制冷机具有体积功耗小、质量轻、低振动等优点,因此在太赫兹通信、深空探测和空间科学实验等方面的应用具有独特的优势,是国内外深低温机械式制冷机的研究热点。而低温回热材料的性能是制约深低温制冷机发展的关键因素。利用实验室自主设计的液氦温区两级脉冲管制冷机及北京科技大学提供的Gd_2O_2S(GOS)材料,从填充长度等方面,对回热材料在液氦温区高频脉冲管制冷机的应用进行了实验研究。实验结果表明,在目前工况下,回热材料HoCu_2的实验效果是优于GOS,并对此做出了分析和解释。 | 李晓永 全加 刘彦杰 蔡京辉 叶荣昌 | 2017 | 真空与低温2017，23，3： | 0 |
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