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We propose the development of a hardened raman spectrometer capable of shot-noise-limited detection sensitivity, that can simultaneously detect the quantify fuel, air, temperature, and other parameters in turbulent combusting flows. Raman scattering can quantitatively measure the concentration of species such as H2, O2, N2, etc. in combusting flows. Unfortunately, comparaed to elastic scattering ...

The rapid heating of a solid surface due to interaction with a high energy laser beam can lead to vaporization and ionization that generates a plasma plume above the surface. Such plasmas are key elements in material processing techniques such as etching and thin film deposition. Both the process control and the fundamental understanding of these plasmas require diagnostic measurements of variou ...

The U.S. Navy requires an instrument to study the abrasion and eros ion of undersea cables. We propose to build a novel optical device that will accurately map the surface and compute the volume of small depressions on diffusely reflecting surfaces such as cylindrical cables. The instrument is based on the use of two-color holographic contouring. The latest advances in pho ...

Fuel leaks inside missile canisters pose a significant risk to missile performance and nearby personnel. Electro-mechanical or electro-chemical sensors can potentially trigger ignition in the presence of high fuel concentrations. Therefore, there is a need for a new sensor technology that does not rely on electrical signals. We propose a feasibility study to determine the applicability of a ...

In measuring the thermal coefficient of linear expansion (TCLE) of highly-filled polymers used in solid propellants, measurement discrepancies as high as 80% between independent laboratories on the same sample have been reported. Such large inaccuracies in TCLE value can result in very large errors in structural integrity and service life analyses of various propulsion systems. Clearly bette ...

This proposal describes the development of a system to measure in-situ and in real-time, the size distribution and mass concentration of soot particles in turbojet exhausts. The proposed system will work in-situ in highly turbulent environments. The total signal will yield soot mass concentration while the time-resolved signal will yield particle size. Its potentially compact size and large dyn ...

This proposal describes the development of a system to measure in-situ and in real-time, the size distribution and mass concentration of soot particles in turbojet exhausts. The proposed system will work in-situ in highly turbulent environments. The total signal will yield soot mass concentration while the time-resolved signal will yield particle size. Its potentially compact size and large dyn ...

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