Accession Number:

ADA243957

Title:

Development of a Two-Stage Alternate Joule-Thomson Cryo-Cooler for AAWS-M Risk Reduction

Descriptive Note:

Final technical rept. Jan 90-Apr 91,

Corporate Author:

ARMY MISSILE COMMAND REDSTONE ARSENAL AL ADVANCED SENSORS DIRECTORATE

Personal Author(s):

Report Date:

1991-11-01

Pagination or Media Count:

22.0

Abstract:

The latest in infrared imaging Focal Plane Array FPA technology incorporates Mercury Cadmium Telluride, a material that must be cooled to liquid nitrogen temperatures for operation. Fast cool-down, within five seconds, has been achieved under a harsh temperature environment 71 deg C. A Joule-Thomson Cryo-cooler employing two heat exchanger stages has been developed. High pressure Krypton flows through one stage, providing initial pre-cooling, while high pressure Nitrogen simultaneously flows through the other stage. The two- stage gas flow approach along with the superior pre-cooling properties of Krypton enable cool-down under five seconds.

Subject Categories:

  • Guided Missiles
  • Rockets
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE