| 1 | A miniature liquid helium temperature JT cryocooler for space application显示文摘Along with the development of space science and technology,miniature liquid helium temperature long life cryocooler is a focus subject in cryogenic study.Since it is the precondition of space detection researches,institutions of space in many countries do the research on it.In this article,we designed a compound cooling system.A three-stage high frequency thermal coupled pulse tube cryocooler was used to precool a Joule-Thomson(JT)cryocooler.This system has no moving parts at low temperatures and is hence suitable for space operation.Liquid helium temperature was successfully achieved in both open loop and closed cycle experiments.In the closed cycle experiment,when 473 W electric power was inputted,the cooling system reached a no-load temperature of 4.4 K,and a cooling capacity of 11.6 mW was provided at 4.54 K.It is the first miniature liquid helium temperature JT cryocooler in China and the research achievement paves a way for the space application of ultra-long wave infrared detection and THz technologies. | QUAN Jia ZHOU ZhenJun LIU YanJie LI JianGuo MA YueXue LIANG JingTao | 2014 | Science China(Technological Sciences)2014，57，11： | 16 |
| 2 | A closed loop 2.65 K hybrid JT cooler for future space application显示文摘Cryogenics and its applications in space have made a remarkable amount of progresses over the last few decades.In the area of space astronomy,some electronic detectors should be cooled to 1–4 K to improve their performance[1,2].So the miniature 1–4 K cryocooler for space application has become a key field for cryogenic research in recent years.In view of their flexibility and relatively higher efficiency,hybrid JT cryocoolers are widely used in space detectors working at below 4 K.In fact,nearly all the space applications of mechanical cryocoolers working at the temperature of 1–4 K,having been launched or under development are hybrid JT cryocoolers[2–6]. | MA YueXue QUAN Jia WANG Juan LIU YanJie LI JianGuo LIANG JingTao | 2019 | Science China(Technological Sciences)2019，62，2： | 4 |
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