In future space applications, widely distributed sensors, as well as, large deployable structures, such as mirrors and
sunshades, will require active thermal control. However, thermal integration by conductive coupling with regenerative
cryocoolers is not feasible for such distributed loads, as it requires massive copper straps and provides only limited
means of thermal control. To address these issues, we are developing a continuous-flow rectified cooling loop (RCL) for
use with pulse tube refrigerators. The RCL consists of a rectifier, integrated into the cold heat exchanger of the pulse
tube refrigerator, and a flow loop with a MEMS-based, micro-scale, control valve. The RCL allows simple mechanical
integration and has the benefit of load temperature regulation using the actively controlled valve to regulate the gas flow.
The MEMS valve may also serve as the basis for a system of distributed Joule-Thomson (JT) coolers. In this paper, we
summarize the work that has been done to date by Atlas Scientific, in collaboration with the University of Wisconsin
Cryogenic Engineering Group (UWCEG) and the University of Michigan Solid State Electronics Lab (UMSSEL), in
developing the RCL and the MEMS-based micro-scale control valve.