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We propose to demonstrate the feasibility of fabricating a phototransistor using the A1xGa1-xN material system. The proposed phototransitor is based on a GaN-A1xGa1-xN heterojunction which exhibits a 2-D electron gas conduction when a bias is applied on the source-drain terminals. The device is maintained in a nominally OFF state by applying a reverse bias voltage on the gate terminal. With optica ...

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THE COMPLEXITY OF THE NEXT-GENERATION FAULT-TOLERANT ELECTRONIC SYSTEM DESIGN TASKS WILL REQUIRE INTERACTIVE ACCESS TO THE RELIABILITYPREDICTION TOOLS IN ORDER TO ACHIEVE THE DESIRED RELIABILITY GOALS. THIS PROPOSAL ADDRESSES THE INTEGRATION OF THE AFHRL DEVELOPED MISSION RELIABILITY MODEL (MIREM) AND THE AVAILABLE CIRCUIT DESIGN PROGRAMS IN AN ENGINEERING WORKSTATION ENVIRONMENT. THE PROPOSED EFF ...

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CURRENTLY AVAILABLE AUTHORING SYSTEMS HAVE BEEN PROVEN EFFECTIVE IN PRODUCING COMPUTER-BASED TRAINING LESSONS CONTAINING SEQUENCES OF TEXT AND GRAPHICS SCREENS THROUGH WHICH THE STUDENT IS GUIDED UNTIL MASTERY IS ACHIEVED. IN A PERSONNEL TRAINING SIMULATION, FAR MORE ADVANCED CAPABILITIES ARE REQUIRED, INCLUDING MULTITASKING, COMMUNICATION WITH EXTERNAL DEVICES, HIGH SPEED DATA ANALYSIS AND GRAPHI ...

IT IS PLANNED TO DEVELOP A WORKSTATION ENVIRONMENT FOR THE ADVANCED THERMAL HYDRAULIC ENERGY NETWORK ANALYZER (ATHENA) CODE TO FACILITATE FUSION REACTOR DESIGN STUDIES. ATHENA HAS A WIDE RANGE OF CAPABILITIES AND IS AN ESSENTIAL TOOL FOR THE STUDY OF FUSION REACTOR DESIGN. THE PERSONAL-COMPUTER (PC)-BASED WORKSTATION ENVIRONMENT FOR ATHENA WILL STREAMLINE AND AUTOMATE THE DEVELOPMENT OF INPUTDECKS ...

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The developement of four different doping sources for use within an MBE system is proposed. Two high purity, high uniformity sources for use with Carbon, and two such sources will be developed for use with Tellurium. The purity of the species produced by each cell will be studied with a Residual Gas Analyzer. Recommendations concerning the use of these cells in a solid source MBE system will be su ...

High temperature storage heaters are needed to provide clean, hot air for aerodynamic and propulsion testing of hypersonic vehicles. Vitiation heaters do not properly simulate the vehicle flight conditions, thus limiting the ability to develop tomorrow's aircraft in a timely manner. Yttria-zirconia storage heater development work was sponsored by the Air Force in the 1960's, but did not produce an ...

The development of a low-cost reliable and long-life novel, electrochemical sensor with multigas sensing capability that can detect 10 ppb of toxic gases and vapors with a response time of 30 seconds is proposed. During phase I, we will develop an electrochemical amperometric sensor cell with a three electrode configuration using nonaqueous aprotic electrolyte solution. This nonaqueous electrolyte ...