Award

The DOE is in need of affordable and robust cryogenic cooling solutions for use in high-power optics applications. These cryogenic cooling solutions must remain cost effective, exhibit high operational stability, and be adaptable for current and future needs. Specifically, in support of the DOEĺs high-brightness light sources utilizing silicon mirrors and crystals, a cryogenic cooling solution is required to provide the necessary heat lift of 250+ W in the region of siliconĺs zero crossing of its thermal expansion coefficient, at approximately 125 K. Beyond the DOE, the worldwide market for industrial and commercial cryocoolers is developing based on a need for High-Temperature Superconducting (HTS) cooling needs. For example, superconducting motors for wind turbines are being pursued in Europe. As the world economy continues to grow and HTS applications become more widespread, these industries will have an increased need for cryocoolers to meet a growing need of superconducting applications. Concepts will use Phase I to concentrate on configuration and optimization of the Reverse-Brayton Cryocooler to provide integrated cooling needs. Phase I will be used to explore several fundamental questions through R&D, including defining system specifications, deciding on preferred cycle gas and defining the turbomachinery drivetrain design to be used going into Phase II.