Award Data

In this abstract the development of vertical power transistors utilizing bulk GaN substrates with breakdown voltages of 1200V or higher, normally-off operation, and a drain current rating of 100A is proposed. These devices will feature vertical current flow, avalanche ruggedness, and a wide operating temperature range (-55 to 150°C). The target specific on-resistance for the transistor is 30x low ...

To meet the requirements of the Army Solid Waste Remediation System, for Small Contingency Base Camps, Altex has developed a Compact Ward Furnace Energy Recovery System (CWFERS), which was proven feasible by testing and analysis, under a Phase I award. The system reduces fuel consumption by 92% fuel, compared to a traditional remediation system, and converts the energy in the bulk waste to hot wa ...

GaN-based devices are the basis of a variety of modern electronics applications, especially in optoelectronics and high-frequency / high-power electronics. These devices are based on epitaxial films grown on single-crystal wafers. The single-crystal wafer substrates are limiting because of their size, expense, mechanical properties and availability. If one could make GaN-based devices over large a ...

In this abstract the development of vertical power transistors utilizing bulk GaN substrates with breakdown voltages of 1200V or higher, normally-off operation, and a drain current rating of 100A is proposed. These devices will feature vertical current flow, avalanche ruggedness, and a wide operating temperature range (-55 to 150°C). The target specific on-resistance for the transistor is 30x low ...

Regular inspection of piping for corrosion damage is crucial in nuclear power plants to prevent leakage of radioactive material into the environment, and to allay concerns of residents living within the vicinity. However, currently used methods for detecting corrosion on interior surfaces of reactor components are difficult to apply in confined spaces and do not always provide enough information. ...

Present day photoinjector cathodes have a poor lifetime or inadequate quantum efficiency for advanced applications. In addition, the efficiency is constrained by the frequency up- conversion in the drive laser from infrared to ultraviolet photons. Novel nanofabrication techniques allow for the sub-wavelength patterning of grooves and hole-array surfaces on the cathode. Exploiting the surface plas ...

THE OBJECTIVE OF THIS PROJECT IS TO EMPLOY THE BETATRON PRINCIPLE TO PRODUCE AN INEXPENSIVE ELECTRON ACCELERATOR CAPABLE OF PRODUCING 20-50 MEV ELECTRONS WITH GOOD BEAM QUALITY AND HIGH-AVERAGE CURRENTS OF UP TO 5-50 MUA. IN CONVENTIONAL BETATRONS WHICH HAVE BEEN IN EXISTENCE FOR OVER 50 YEARS, EDDY-CURRENT LOSSES IN THE IRON LIMIT THE OPERATING FREQUENCY, THUS LIMITING THE MAXIMUM ENERGY AND CUR ...

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