Award Data

COMPOSITE MATERIALS HAVE BEEN DEVELOPED THAT POTENTIALLY YIELD A THERMAL CONDUCTIVITY OF UP TO 1000 W/M-K IN UNIAXIAL ORIENTATION. THIS YIELD IS SUFFICIENTLY HIGH TO ALLOW MULTIDIMENSIONAL DESIGNS THAT MEET OFF-AXIS THERMAL AND MECHANICAL PROPERTY CRITERIA AND MATCH THE COEFFICIENT OF THERMAL EXPANSION TO OTHER COMPONENTS WITHIN A RANGE OF 0 TO 10 X 10(-6) PPM. EXPLOITATION OF THESE ULTRAHIGH THER ...

AN INNOVATIVE INTEGRAL DIELECTRIC HEAT SINK MATERIAL, DIAMOND/CARBON/CARBON COMPOSITE, IS PROPOSED IN THIS PHASE I RESEARCH FOR THE USE IN FUTURE ADVANCED ELECTRONIC DEVICES. CARBONE/CARBONE COMPOSITE HAS A HIGHER THERMAL CONDUCTIVITY AND LOWER DENSITY, AND THEREFORE A HIGHER SPECIFIC THERMAL CONDUCTIVITY, AS COMPARED TO METALS. HOWEVER, CARBON IS ALSO AN ELECTRIC CONDUCTOR. WE PROPOSE TO APPLY DI ...

IT IS PROPOSED THAT ADVANCED ARCJET ENGINES CAN BE DEVELOPED USING KNOWN PRINCIPLES FOR ADVANCED NOZZLE DESIGN, ARC ATTACHMENT, INCREASED CHAMBER EFFECTIVE TEMPERATURE AND SO FORTH. SUCH STUDIES ARE PARTIALLY SUPPORTED BY EXPERIMENTAL RESULTS BY RESEARCHERS IN THE RUSSIAN FEDERATION. YET THESE PRINCIPLES RESULT IN INCREASED HEATING OF THE ANODE, AS THE ARC MORE EFFECTIVELY HEATS THE ANODE. THIS CA ...

BIMODAL REACTORS FOR POWER AND PROPULSION HAVE LONG BEEN OF INTEREST FOR MISSIONS REQUIRINGS BOTH HIGH POWER AND LARGE DELTA-V; E.G., HIGH ALTITUDE, GEOSYNCHRONOUS AND PLANETARY MISSIONS. IT PROPULSIVE THRUST AND ELECTRIC POWER CAN BOTH BE SUPPLIED FROM THE SAME UNIT, A LARGE POTENTIAL SAVINGS CAN OCCUR. SUCH A REACTOR CAN BE DEVELOPED FROM A URANIUM CARBIDE FUELED THERMIONIC REACTOR WITH SINGLE C ...

Very compact cathode ray tubes could be fabricated if high voltages presently required for normal operation could be reduced by a factor of ten. This requires a very effective cold cathode. A cold cathode capable of delivering several hundred amps per square centimeter (under ambient conditions without the introductin of cesium vapor) would be valuable for a number of applications in high power hi ...

IT IS WELL-ESTABLISHED THAT POOR THERMAL MANAGEMENT IS A LIMITING FACTOR IN RELIABILITY AND LIFETIME OF ELECTRONIC COMPONENTS IN ADVANCED ELECTRONIC SUBSTRATES OR HEAT SINKS. FUNDAMENTAL PROCESSES FOR PRODUCING A NOVEL DIAMOND FIBER WITH ENHANCED PHYSICAL PROPERTIES ARE BEING STUDIED. THE FIBERS ARE BEING PRODUCED BY DEPOSITING POLYCRYSTALLINE DIAMOND FILMS ON HIGHLY GRAPHIC, MICRON-SIZE FIBER THR ...

IN PHASE I AN IN-SIT METHOD IS PRESENTED FOR ELECTRICALLY HEATING EMITTERS OF MULTI-CELL IN-CORE THERMIONIC FUEL ELEMENTS (TFES). NUCLEAR HEATING IS NOT REQUIRED. THIS IS ACCOMPLISHED BY SUPPLYING PULSES OF ELECTRIC CURRENT TO MOMENTARILY BIAS THE COLLECTORS IN THE TFE WI A SEVERAL-VOLT NEGATIVE VOLTAGE. ELECTRONS ARE EMITTED FROM THE NOMINAL COLLECTOR VIA SCHOTTKY EMISSION AND HEAT THE EMITTER VI ...

BERYLLIUM (BE) IS A CANDIDATE MATERIAL FOR DIVERTERS IN NUCLEAR FUSION REACTORS. HOWEVER, THE USE OF BE IS LIMITED BY ITS MODERATE THERMAL CONDUCTIVITY (218 W/M-K) AND BRITTLENESS, BOTH OF WHICH RESULT IN A LOW THERMAL SHOCK RESISTANCE. THE MODERATE THERMAL CONDUCTIVITY AND POOR MECHANICAL STRENGTH ALSO PLACE A LIMITATION ON THE THICKNESS OF THE BE COMPONENT, IN TURN LIMITING THE LIFETIME OF BE DI ...

A NOVEL APPROACH TO LOW COST SHAPED BEAM SCANNING FOR MONOLITHIC STRUCTURES IS PROPOSED. THE TECHNIQUE MAKE USE OF RADOME MATERIAL COSTING OF THE CONVENTIONAL MONOLITHIC STRUCTURE; THE RADOME ITSELF IS COMPOSED OF A COMPOSITE OF HIGH DIELECTRIC CONSTANT/MAGNETICALLY SENSITIVE MATERIAL-REFERED TO AS "DIELECTROMAGNETIC" (DEM) MATERIAL. THE DEM MATERIAL CHARACTERISTICS ARE DESIGNED TO PROVIDE A SHAPE ...

Due to the limited space and the need for flush mounting charactistics, a new and novel series of antenna systems for communications and ECM is proposed. It is proposed to use dielectromagnetic (DM) materials to miniaturize antennas and for RF DM lens to focus the RF signals into the below the surface antennas. An Astron pioneered subminiature direction finding system using DM materials, will be m ...