Development of a Two-Stage Pulse Tube Cryocooler for 35 K Cooling

Lockheed Martin has developed a unique two-stage, linear motor driven pulse tube cryocooler for cooling at 35 K for space applications. This system, developed under Lockheed Martin Independent Research and Development (IRAD) funding, demonstrates excellent power efficiency, providing 0.5 W of heat lift with 57 W of compressor power. A no-load temperature of 19.8 Kwas achieved.