Award Data

SHIELD RITE proposes to utilize a finite difference, time domain model of the multilayer frequency selective surface (FSS) to examine how the bandwidth and the angular dependence of the reflection (or transmission) coefficient depend upon the number of layers and the spacing between the layers. We shall then look at the power handling capabilities of these filters by examining the electric fields ...

Data transmission through helicopter rotating interfaces using sliprings is much less reliable than desired. WHile sliprings offer many advantages, they also have several principal disadvantages. Dropout and errors are introduced onto signals as the interfaces wear and become contaminated. In addition, misalignment of the contacting surface due to relative movement between the fixed interface a ...

AN ECONOMICAL FRAGMENT LAUNCH SYSTEM IS NEEDED TO DUPLICATE WARHEAD FRAGMENT/AIR TARGET ENCOUNTER CONDITIONS ASSOCIATED WITH MODERN AIR TO AIR COMBAT. THE OBJECTIVE OF THIS EFFORT IS TO PROVIDE A DETAILED CONCEPTUAL DESIGN, INCLUDING BUILDING AND OPERATING COST ESTIMATES, FOR A LAUNCH SYSTEM CAPABLE OF PROJECTING METALLIC, PARALLELEPIPED FRAGMENTS WITH WEIGHTS IN THE RANGE OF 30-250 GRAINS (1.9-16 ...

Contractor will implement techniques for combining EM coupling codes and circuit analysis codes to determine transfer functions from HPM threats (cw and pulsed) to circuit component responses. Techniques will be general enough to treat pulse rise time, total energy, and duration. Treatment will be general enough to work for friendly or unfriendly satellites. Coupling through antennas, sensors, lea ...

THE EFFICIENCY OF THE SCRUBBER ON THE HF HIGH ENERGY LASER WILL BE MEASURED UTILIZING FOURIER TRANSFORM INFRARED SPECTROSCOPY (FTIR). CONCENTRATIONS OF HF AND FLOWS WILL BE MEASURED BEFORE AND AFTER THE SCRUBBER, AND RECOMMENDATIONS MADE TO IMPROVE SCRUBBER EFFICIENCY, IF NECESSARY. AMBIENT AIR SAMPLING USING EITHER FTIR OR OTHER WET CHEMICAL METHOD WILL BE PERFORMED TO VALIDATE THE MODEL PREDICTI ...

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This project will develop a method for forming and emplacing a horizontal barrier within a groundwater aquifer to prevent downward migration and further contamination of groundwaters by Non-Aqueous Phase Liquids (NAPLs). Certain properties of the immiscible liquid system act to form the barrier from injected particulate or colloidal materials and to stabilize the barrier once it is form ...

A significant problem in precision manufacturing of large parts/assemblies is the requirement to make measurements over the surfacesof these parts for a variety of reasons including inspection/quality control; control of surfacing operations such as coatings, abrasive erosion, buffing, and texturing; and generation of "as built" documentation. A specific instance of this class of problem has been ...

A TEST INSTRUMENTATION SYSTEM IS PROPOSED FOR THE DETECTION AND ISOLATION OF UPSET FAULTS PRODUCED BY TRANSIENT RADIATION IN VHSIC CLASS ASICS AND GENERAL PURPOSE MICROCIRCUITS. THE PROPOSED SYSTEM IS COMPOSED OF A HIGH SPEED WORK STATION, A PORTABLETESTER, AND A SEPARABLE TEST HEAD CONTAINING THE DEVICE UNDER TEST TO BE PLACED IN THE RADIATIONN BEAM. THE WORK STATION ACTS AS A CONTROLLER FOR THE ...