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THE SODIUM HEAT ENGINE (SHE) IS AN EFFICIENT DEVICE FOR THE DIRECT CONVERSION OF THERMAL ENERGY TO ELECTRICAL ENERGY. THE DEVICE HAS HIGH SPECIFIC POWER BOTH ON A VOLUME AND WEIGHT BASIS, HIGH CONVERSION EFFICIENCY WHICH IS INDEPENDENT OF SIZE, AND NO MOVING PARTS WHICH IMPLIES POTENTIALLY HIGH RELIABILITY. THESE ATTRIBUTES MAKE THE SHE AN ATTRACTIVE DEVICE FOR SDI APPLICATIONS. ALTHOUGH THE PRINC ...

THE PROPOSED PROJECT WILL DEVELOP MATERIALS AND SUPPORTING THERMAL TECHNOLOGY LEADING TO DESIGN OF HIGH POWER PULSE CONDUCTORS FOR SPACE APPLICATIONS. IN PHSE I WE WILL EVALUATE AN EM GUN SYSTEM, IDENTIFY ALTERNATIVE MATERIALS AND THERMAL APPROACHES FOR SELECTED COMPONENTS, AND IDENTIFY TECHNOLOGY REQUIREMENTS. COMPONENT DEVELOPMENT FEASIBILITY AND BENEFITS WILL BE DEFINED.

THE NEED FOR INCREASING THE SENSITIVITY OF SPACE-BORNE SENSORS WILL REQUIRE DEVELOPMENT OF LONG-LIFE, HIGHLY EFFICIENT HELIUM LIQUIFIERS. CONVENTIONAL HELIUM LIQUIFIERS EMPLOY A JOULE-THOMSON EXPANSION VALVE TO EXPAND THE HELIUM AT TEMPERATURES BELOW ABOUT 10 DEG K. IT HAS BEEN SHOWN THAT GAINS OF UP TO 30% IN OVERALL CYCLE EFFICIENCY CAN BE OBTAINED IF THE JOULE-THOMSON VALVE IS REPLACED BY AN EX ...

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THE OBJECTIVE OF THE PHASE II PROJECT IS TO EXPERIMENTALLY DEMONSTRATE THE PERFORMANCE OF SMALL STIRLING CYCLE CRYOCOOLER WITH INNOVATIVE DESIGN AND CONSTRUCTION FEATURES. THE EFFORT ENTAILS DESIGN AND DEVELOPMENT OF COMPONENTS, INTEGRATION INTO AN ENGINEERING MODEL CRYOCOOLER, AND TESTING OF THE CRYOCOOLER FOR PERFORMANCE AND ENDURANCE. ANTICIPATED BENEFITS OF THE INNOVATIVE DESIGN INCLUDE FIVE ...

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BIPOLAR BATTERIES CAN, IN PRINCIPLE, YIELD ORDERS OF MAGNITUDE HIGHER SPECIFIC POWER THAN CONVENTIONAL, PARALLEL PLATE BATTERIES. SUCH BATTERIES BEGIN TO HAVE PERFORMANCE CHARACTERISTICS SIMILAR TO CAPACITORS AND COULD POSSIBLY BE USED TO REPLACE CAPACITOR FOR SOME APPLICATIONS. BATTERY PERFORMANCE OF BETWEEN 5 AND 2 A/CM2 AT 1.0 V CELL POTENTIAL FOR A TIME PERIOD OF 500 MICROSECONDS WITH ELECTROD ...