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Not Available Aluminum-Beryllium alloys (A1BeMet) are binary alloys that combine the high modulus and low density characteristics of beryllium with the fabrication and mechanical property behavior of aluminum. These characteristics are extremely desirable for advanced satellite and space applications. Cost($2000/lb) of the alloys has been the main drawback to their use. By combining thin A1BeMet ...

Not Available Lightweight structures are demanding for high inach vehicles and engine exhaust impinged structures subjected to high temperatures. Currently used polyimide composites have limited service temperatures whereas titanium alloys have much higher densities than those of advanced composites. This Phase I research proposes the processing of high temperature sandwich structures using micro ...

Not Available We propose to design and build an analog VLSI smart-pixel wavefront-sensor chip that will drive a deformable membrane mirror to correct rapidly changing wavefront distortions. On-chip detectors will sense the error signal in local wavefront tilts using a Hartmann-sensor within a feedback loop. The error signal is then used to drive the membrane mirror to the phase conjugate of the i ...

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The objectives of the proposed work are to develop the technical feasibility and detailed requirements for new methods and technology to decrease, substantially, the cost and time required to digitize and store high-speed, high-resolution film without sacrificing the spatial and grayscale depth of the original film. The work will be aimed at improvements that would make it practical to digitize a ...

Low-temperature MBE grown GaAs (LT-GaAs) contains a high concentration of excess As which gives rise to ultra-fast carrier-trapping time and excellent radiation hardness. In as-grown layers most of this excess As is in the form of As(Ga) antisite defects, of which only ~1% are ionized. Thermal annealing upon overgrowth with a device structure or during device processing results in a decrease of ...

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Several important emerging applications require efficient, high-speed high-duty-cycle, amplitude modulation of high levels of microwave power, with low cost and small size-and-weight. The modulation frequency and average power required for these applications are far beyond the capabilities of existing technology. MRC proposes to research and develop two alternative methods of achieving square-wa ...

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