A miniature liquid helium temperature JT cryocooler for space application

• 作 者: QUAN Jia ZHOU ZhenJun LIU YanJie LI JianGuo MA YueXue LIANG JingTao
• 机 构: Technical Institute of Physics and Chemistry, Chinese Academy of Sciences,University of Chinese Acad
• 出 处: Science China(Technological Sciences)
• 发表日期: 2014年11期
• 关键词: miniature helium precondition Thomson institutions hence Figure cycle Joule orif

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.

Along with the development of space science and technology, miniature liquid helium temperature long life cryocooler is a focus subject in cryogenic study .ince 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 thus 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 input, 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 detect ion and THz technologies.