In this paper a miniature single-stage Stirling cryocooler for cooling a MCT infrared detector is introduced. The concept of the cryocooler is based on the Oxford-type Stirling refrigerator featuring special flexure suspension springs, linear drive motors, and clearance seals without wear for long-term operation. Cooling tests have demonstrated a no-load temperature of 43 K and a cooldown time of 20 minutes for a compressor power consumption of about 30 W.
To reduce mechanical vibration disturbances, a head-to-head arrangement of the two refrigerators was adopted in the system configuration; the effect of electromagnetic interference (EMI) of the refrigerators on the detector was also considered. The cooling power is transmitted from the cold heads to the cold platform, on which the detector is seated, through a flexure cold link. The overall system can provide 300 mW of cooling power at the detector at 80 K. Power consumption is less than 80 W (including controller), the induced vibration force is less than 0.2 N, and the EMI noise is greatly reduced.
Cooling System for Space Application
Cryocoolers 10 ; Chapter : 92 ; 787-790
2002-01-01
4 pages
Article/Chapter (Book)
Electronic Resource
English
Cooling System for Space Application
British Library Conference Proceedings | 1999
|Engineering Index Backfile | 1932
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