Low Cost Space Cryocooler System for Launch and Boost Phase Sensor Applications

Future space based systems will require cryogenic subsystems that are substantially more efficient than those presently in use. Projected requirements for space-based launch and boost phase detection and tracking sensors are 10 W in the 70-110 K range and 20 W in the 160-180 K range. The cryogenic cooling system must also be low in exported vibration so as not to impact unacceptably large jitter to the sensor. The traditional approach is to meet these objectives with a large, two-stage cryocooler coupled to complex control electronics that provide the necessary two-stage temperature control and, in the case of a linear cryocooler, exported vibration control. The South Bay Science and Technology Corporation, as the prime contractor, and Raytheon, as subcontractor, propose to develop a an alternate cryogenic system concept utilizing all low cost space-qualified elements to yield a Low Cost Space Cryocooler System for space-based launch and boost phase detection and tracking sensor applications. The work plan is structured to lead into the subsequent hardware phase.