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THE NEXT GENERATION OF HIGH POWER, HIGH FREQUENCY ELECTRONIC DEVICE TECHNOLOGY WILL BE BASED ON WIDE BANDGAP SEMICONDUCTOR MATERIALS SUCH AS SIC, GAN AND DIAMOND. OF THESE, SILICON CARBIDE IS THE MOST PROMISING MATERIAL FOR NEAR TERM APPLICATIONS, SINCE ITS PROCESSING SHARES MANY COMMON FEATURES WITH WELL-ESTABLISHED SILICON PROCESSING. TECHNOLOGY HAS BEEN DEMONSTRATED FOR PRODUCING OHMIC AND SCHO ...

IMPROVING THE OXIDATION RESISTANCE OF CARBON-CARBON COMPOSITES IS KEY TO EXPANDING THE USE OF THIS MATERIAL SYSTEM INTO HIGHER TEMPERATURE APPLICATIONS. WHILE BORON PARTICLES HAVE BEEN ADDED TO THESE MATERIALS TO SEAL CRACKS IN PROTECTIVE COATINGS, OXIDATION OF THE CARBON MATRIX NEIGHBORING THE BORON PARTICLES SERIOUSLY AFFECTS COMPOSITE STRENGTH. THIS PROBLEM IS EXACERBATED BY A NATURAL SEGREGATI ...

SINGLE CRYSTAL BATIO3 HAS ELECTRO-OPTIC AND PHOTOREFRACTIVE PROPERTIES THAT ARE AMONG THE MOST DESIRABLE OF ALL INORGANIC MEDIA. THE MATERIAL ALSO POSSESSES FERROELECTRIC PROPERTIES AND AN EXCEPTIONALLY HIGH DIELECTRIC CONSTANT, WHICH MAKE BATIO3 FILMS HIGHLY ATTRACTIVE FOR RADIATION HARD AND DRAM ELECTRONIC MEMORIES. USE OF BATIO3 FILMS FOR INTEGRATED ELECTRO-OPTICS WILL REQUIRE LOW OPTICAL LOSSE ...

REQUIREMENT OF HEAVY AND VOLUMINOUS PERMANENT MAGNETS IN DEVICES SUCH AS MICROWAVE GENERATORS, NON-RECIPROCAL CIRCULATORS, ISOLATORS AND THEIR DEVICES MAKES THEM UNATTRACTIVE OF MANY SPACE AND WEIGHT RESTRICTED APPLICATIONS. INCORPORATION OF THESE DEVICES IN LARGE NUMBERS FOR ACTIVE APEMURE RADAR NECESSITATES THE DEVELOPMENT OF SMALL, MONOLITHIC CIRCULATORS BASED ON A THIN FILM MAGNET TECHNOLOGY. ...

IN THE PRACTICAL APPLICATIONS OF HYDROCARBON FUELS IN ADVANCED AIRCRAFT, THE MOST IMPORTANT CONSIDERATION IS TO KNOW UNDER WHAT CIRCUMSTANCES THE FUEL WILL DEGRADE TO THE EXTENT THAT A DEPOSIT IS FORMED. THE DEVELOPMENT OF THIS UNDERSTANDING OF FUEL BEHAVIOR HAS BEEN HAMPERED BY THE LACK OF TECHNIQUES FOR ON-LINE MEASUREMENT OF DEPOSIT FORMATION. THE PHASE I PROPOSAL IS TO DEVELOP AN EXPERIMENTAL ...

Liquid oxygen systems are currently used in all high specific impulse, high thrust space propulsion systems. Although more energetic oxidizers have been demonstrated to exhibit superior performance, they have not been used because of their reactivity with materials and/or their hazards. Mixtures of powerful solid oxidizers with solid oxygen have been found to have greatly reduced reactivity and gr ...

THIS PROPOSAL ADDRESSES THE DEVELOPMENT OF A SOLID STATE LASER SCANNER FOR ROUTING A HIGH ENERGY LASER BEAM AMONG THE FIBER OPTIC ENERGY TRANSFER PATHS OF A LASER ORDNANCE INITIATION SYSTEM. A SOLID STATE LASER SCANNER WITH NO MOVING PARTS WILL ENABLE A MORE COMPACT AND DURABLE LASER ORDNANCE INITIATION SYSTEM. APA OPTICS' SOLID STATE LASER SCANNER UTILIZES INTERGRATED OPTIC WAVEGUIDES OF ALGAAS A ...

WE PROPOSE A PHASE I RESEARCH PROGRAM AIMED AT DEPOSITING SINGLE CRYSTAL BN FILMS OVER SAPPHIRE AND SILICON CARBIDE SUBSTRATES. OUR PLAN IS TO EMPLOY A UNIQUE PHOTO-ASSISTED SWITCHED ATOMIC LAYER EPITAXY PROCESS. THIS WE FEEL WILL REDUCE THE SINGLE CRYSTAL EPITAXY TEMPERATURE VALUES CLOSE TO 1400C. WE ALSO PROPOSE TO USE A UNIQUE MULTILAYER BUFFERING PROCEDURE TO DECREASE THE INTERFACE DEFECTS RES ...

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PRESENT X-RAY GENERATORS ARE AVAILABLE UP TO 420 KV CONSTANT POTENTIAL. ABOVE THIS ENERGY LINEAR ACCELERATORS ARE AVAILABLE FROM 2 MEV UPWARDS. THIS PROPOSAL WOULD INVESTIGATE BUILDING A 1 MEV CONSTANT POTENTIAL X-RAY GENERATOR. THE GENERATOR WOULD BE SINGLE ENDED WITH POSSIBLE INTERCHANGEABLE ANODES AND A CHOICE OF DISPENSER OR MICROFOCUS CATHODES. THE HIGH VOLTAGE SUPPLY WOULD BE STABLE AND ACCU ...