DEVELOPMENT OF A MINIATURIZED REFRIGERATOR FOR SPACE APPLICATIONS.
LITTLE (ARTHUR D) INC CAMBRIDGE MASS
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The primary objectives of this program are to demonstrate an experimental reciprocating cooling device with the following characteristics Ultimate life of three years continuous, unattended operation in a satellite environment with an in ternal temperature variable from 273 to 300 deg. K. Cooling capacity of 2 watts at a temperature of 77 7 deg. K, measured at the cold fluid terminals of the refrigerator, with maximum power input of 100 watts of electric power. Volume not in excess of 610 cubic inches, length not in excess of 24 inches, diameter not in excess of 8 inches, and weight not in excess of 15 pounds. Ability to cool infrared detector arrays and tubes without significantly degrading their noise characteristics from those realized by immersing them in liquid nitrogen at atmospheric pressure. Adaptability to space radiators for the rejection of internally generated heat. Further, the technology developed in this program is to be applicable to future coolers for operation at temperatures as low as 4.2 deg. K or at other temperatures intermediate between 77 and 4.2 deg. K. Author