EXPERIMENTAL STUDY ON COOL-DOWN TIME OF SELF-REGULATED JOULETHOMSON COOLER WITH PRECOOLER

Compared to the Stirling cooler，miniature Joule-Thomson cooler（J-T cooler）has the advantages of small size，light weight，short cool-down time，high reliability，low cost and the cold end without moving part，which is wildly applied in infrared seeker.In order to optimize cool-down time and gas consumption，designing a bellows self-regulated fast-cool-down J-T cooler with precooler.Compared to other kinds of J-T coolers by experiment，the J-T cooler with precooler cool down faster than the single self-regulated J-T cooler，and its’gas consumption is less than the non-self regulated J-T cooler with precooler.The cool down time of the J-T cooler with precooler is 12 s@90 K，15 s@80 K，and its’gas consumption is optimized.