Award Data

High sensitivity HgCdTe focal plane arrays operating at 77 K can be tailored for response across the infrared spectrum. However, the cooling systems required to achieve the desired sensitivity makes them heavy and therefore unsuitable for the next generation of interceptor seekers. Reducing cooling requirements will allow the detector’s integration in lighter and more compact systems. Superior o ...

The objectives of this proposal are to develop and demonstrate a novel physics-based computational electromagnetics (CEM) algorithm for accurate and efficient predication of radar signatures of MDA objects of interest (MOIs) and to implement and demonstrate a robust stochastic collocation-based algorithm for efficiently quantifying the effect of geometrical and material uncertainties on the signat ...

Infrared photon sensors presently available for ballistic missile defense applications, with a cutoff wavelength ~10 micron, are based on HgCdTe. These suffer from a high non-uniformity and thus a high focal plane array cost. The most promising alternative is III-V compound semiconductor superlattices based on arsenides and antimonides, such as Type-II InAs/GaSb superlattices, which are expected ...

MANY OF THE COMMERCIAL SENSORS IN USE (OR UNDER DEVELOPMENT) ARE BASED IN METAL-OXIDE CERAMIC MATERIALS. METAL-OXIDES OFFER SPECIAL ADVANTAGES BECAUSE OF THEIR CHEMICAL AND THERMAL STABILITY, FAST RESPONSE TIMES, AND SENSITIVITY TO ELECTROCHEMICAL CHANGES. THERE ARE REPORTED CASES THAT SHOW ADSORPTION OF WATER IN METAL OXIDES OFTEN ENHANCING BOTH THE SURFACE CONDUCTIVITY AND DIELECTRIC PROPERTIES ...

AN IMPORTANT COMPONENT OF ARCJET THRUSTERS IS THE INSULATOR HOLDING THE CATHODE BASE AND SEPARATING THE ELECTRODES. THE CURRENT BASELINE MATERIAL IS BORON NITRIDE (BN), WHICH IS WELL KNOWN FOR ITS HIGH ELECTRICAL RESISTIVITY AND HIGH THERMAL CONDUCTIVITY. HOWEVER, AT ARCJET OPERATING TEMPERATURE, BN HAS A DRAMATIC INCREASE IN ELECTRICAL CONDUCTIVITY AND A DECREASE IN THERMAL CONDUCTIVITY. ADDITION ...

THE FEASIBILITY STUDY WILL BE IN EIGHT ELEMENTS WITH ELEMENT 1 BEING AN ANALYSIS OF CURRENT TRANSPORTATON PLANNING AND ENGINEERING SOFTWARE AND HARDWARE USE. DESIGN-COMPUTERS WILL BE IDENTIFIED IN THIS ELEMENT. IN ELEMENT 2, AN ANALYSIS OF DATA INPUT OPTIONS AND THEIR IMPLICATIONS FOR THE SOFTWARE AND DESIGN-COMPUTER HARDWARE IDENTIFIED WILL BE COMPLETED. THE REQUIREMENTS TO ACCOMODATE AUTOMATIC V ...

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THE TECHNOLOGIES OF HIGH BRIGHTNESS X-RAY SOURCES AND HOLOGRAPHIC IMAGING INDIVIDUALLY HAVE A LARGE RANGE OF POTENTIAL APPLICATIONS IN DEFENSE, COMMERCIAL, AND SCIENTIFIC SECTORS. THE FEASIBILITY IS BEINGDETERMINED OF DEVELOPING A COMMERCIALLY VIABLE TECHNOLOGY FOR BIOLOGICAL X-RAY MICROHOLOGRAPHY INTEGRATING BOTH HIGH BRIGHTNESS X-RAY SOURCE AND THE TECHNOLOGY FOR IMAGE RECONSTRUCTION. SPECIFICAL ...