This SIS mixer receiver is reliable, and can achieve good noise performance even operated at 4.3k temperature with a close cycle helium refrigerator.
这种SIS混频接收机性能可靠，且可用闭合循环氦制冷机冷却，在4.3K温度操作即可达到好的噪声性能。
The paper introduces the helium turbine which used in helium refrigerator of space environment simulator, including its design, setting-to-work test and its characteristics.
文章介绍了载人航天空间环境模拟器气氦制冷系统中氦气透平膨胀机的设计、制造、调试等过程，并说明了它具备的特点。
The dynamic simulation result also indicates that the trial-run scheme of helium refrigerator can be optimized and the debugging cost and time can be saved though dynamic simulation.
仿真结果还表明，氦制冷系统的动态仿真结果可以对优化氦制冷机试车方案、节省调试费用、节约调试时间、进一步提高氦制冷机制冷效率提供可靠的理论基础。
The authors give a novel conception that in order to increase the cooling capacity of a pulse tube refrigerator at 80K temperature range, refrigerant mixtures are introduced instead of pure helium.
提出了采用合适的混合工质代替纯质氦以提高脉管制冷机在80K温区制冷量的新构思。
The disequilibrium of the enthalpy difference of helium at liquid - helium temperature region results in that the temperature distribution in the regenerator of a GM refrigerator forms a platform.
由于在液氮温区附近氦气高低压焓差不平衡，导致G-M机蓄冷器中温度分布出现低温平台。
The optimization of the operational parameters and the experimental study with helium-hydrogen mixture on the miniature co-axial pulse tube refrigerator are carried out.
进行了微型同轴脉管制冷机系统运行参数的优化及氢氦混合工质应用的试验研究。
Small totally enclosed helium compressor is a componend equipment of G-M refrigerator. It is widely used in space environment simulation equipments, vacuum cryopump and vacuum coating equipments etc.
小型全封闭式氦气压缩机是G-M制冷机的配套设备，广泛应用于空间环模设备、真空低温泵、真空镀膜等。
Small totally enclosed helium compressor is a componend equipment of G-M refrigerator. It is widely used in space environment simulation equipments, vacuum cryopump and vacuum coating equipments etc.
小型全封闭式氦气压缩机是G-M制冷机的配套设备，广泛应用于空间环模设备、真空低温泵、真空镀膜等。
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