中文摘要：

经过多次调整，计划将于2018年发射的詹姆斯·韦伯太空望远镜（JamesWebbSpaceTelescope，简称JWST）中的中红外仪（Mid—InfraredInstrument，简称MIRI）低温制冷系统最终选用三级脉管制冷机预冷J—T（Joule．Thomson）循环的复合型低温制冷技术。详细介绍了该技术的发展历程，表明该复合型低温制冷技术已在空间任务中逐渐替代固氢或液氦杜瓦技术，以期为国家未来空间计划的实施提供借鉴。

英文摘要：

Development history of the Mid-Infrared Instrument cryogenic system on the James Webb Space Telescope, which will be launched in 2018 ,was introduced in detail. The cryogenic system was based on a hybrid cryocooler consisting of a three-stage pulse tube precooler and a Joule-Thomson loop. It was shown that the traditional solid hydrogen or liquid helium dewars were gradually replaced by the hybrid cryo- coolers in space missions.