Award Data

The Goal of this STTR is to develop a high speed, high power, waveguide based modulator (phase and amplitude) and investigate its use as a pulse slicer. The key innovation in this effort is the use of potassium titanyl phosphate (KTP) waveguides making the high power, polarization based waveguide amplitude modulator possible. Furthermore because it is fabricated in KTP, the waveguide component w ...

The high-intensity level acoustic load generated by large launch vehicle lift-off propulsion is of major concern for the integrity of the launch complex and the vehicle payloads. The currently practiced computational methods are unable to offer the reliability of both the noise generation mechanism and acoustic environment. In order to uniquely address both of these critical aspects, the proposed ...

NASA Stennis Space Center (SSC) is one of the largest consumers of gaseous helium in the world through its engine testing operations. Because helium is a nonrenewable resource, it is desirable to conserve the gas when possible. For safety purposes, helium is used to purge an engine following a test that utilizes cryogenic liquid hydrogen fuel (e.g. a Space Shuttle Main Engine test). This proposal ...

A plan is presented to demonstrate the feasibility and practicality of a radio-frequency Hayes-Corron (H-C) chaos-based communication system employing an optimal spread-spectrum chaotic communication theory to achieve superior low-power, low-probability of interception, multiple-user access, and portability goals. By integrating three concepts: 1) chaotic spreading sequence generation, 2) Hayes en ...

A particle-systems approach is proposed for rendering obscurants in tactical missile scene generation. Obscurants are currently rendered using arrays of voxels, small homogeneous cubes containing concentration and temperature data. Voxels have been highly successful but they require huge data files and are very slow to render. The particle systems would not replace voxels for high-fidelity applica ...

A technique that enables new methods of obscurant modeling with faster rendering while maintaining or improving physical fidelity is proposed. the proposed technique not only exhibits the qualities of voxel based obscurants, but matches real-world data as well. The main objective from Phase I efforts will be a specification for the technique of generating physically correct and efficient obscuran ...

Bridger Photonics and the University of Arizona will develop a passive multi-band compressive sensor for imaging and object recognition applications. The Army has identified a need for multi-band imagery for intelligence, surveillance and reconnaissance missions among others. Multi-band systems offer enhanced discrimination capability and the ability to perform in adverse conditions (at night, smo ...

The project will remove a key difficulty that currently hampers many existing methods for computing unsteady electromagnetic waves in unbounded regions. The accuracy and/or stability of the simulations may deteriorate over long times due to the treatment of the outer boundaries via artificial boundary conditions. We propose to develop a universal algorithm and software that will correct this probl ...

With the advent of more efficient hydrogen reforming systems, a practical hydrogen source has lead to investigations on the operating characteristics of diesel (JP-8) engines with a hydrogen/syngas additive. Several sources have reported that higher thermal efficiencies and lower pollution occur when hydrogen is added to the fuel stream. The objective of this proposal is to experimentally quanti ...

The objective of this research is to develop materials that may replace the current generation of visible smoke formulations used by the U.S. military. In particular the materials must produce low flame so that they do present a fire hazard, have relatively low toxicity, and are efficient. The efficiency is defined in a figure of merit that combines fill factor, yield factor, extinction coeffici ...