Award Data

The accurate numerical prediction of hazardous airborne plumes requires two important capabilities. First, meteorological conditions at fine spatial scale both at the time of plume release as well as a few hours into the future, and second, quantification of this information in a statistically reliable probabilistic framework. The proposed study will use a combination of fine-scale ensemble re-fo ...

Large x-ray generators using Ar gas filled loads are an important element in the DTRA simulator program to provide users with a relevant fluence of x-rays for evaluating the radiation hardness of components used in military systems. With ostensibly identical initial conditions and generator parameters, 33% variations in the average yield have been observed. The one unmeasured parameter is the actu ...

A diagnostic is proposed that uses the Doppler effect in visible-light emission lines to deduce the ion velocity during the implosion phase of a gas-puff z-pinch. The diagnostic combines an innovative light collection and detection scheme with gas doping to determine the ion velocities. The proposed instrument will be able to determine implosion velocities over a 100 ns range on a single shot usi ...

Materials and Manufacturing Systems, Inc. (MATSYS) proposes to develop novel reactive structural materials for the enhancement of munitions lethality. This effort will combine our unique expertise in instrumented-Hot Isostatic Pressing (HIP) with new approaches in intermetallic design to develop a new generation of cost-efficient, high strength and reactive composites. The proposed material syst ...

Large X-ray generators using gas fill loads are a key element in the DTRA simulator program. Consistent relative timing between the injection of the gas shell and the generator current pulse is crucial to producing consistent, high-yield x-ray pulses.To that end HY-Tech proposes replacing existing high voltage trigger pin technology, with a sensitive, all fiber-optic heterodyne interferometer ba ...

CURRENT COROPUTER ANALYSIS OF BUBBLE-SUBMERGED STRUCTURE INTERACTION, DUE TO CONVENTIONAL WEAPONS, IS EXTREMELY RESOURCE INTENSIVE. THEREFORE, IT IS VERY DIFFICULT TO REPLACE FULL SCALE LIVE FIRE TESTING OF SUBMERGED STRUCTURE WITH SCALE TESTING OF SUBMERGED STRUCTURES AND COMPUTER ANALYSIS. THE GOAL OF THIS EFFORT IS TO DEVELOP AN ACCURATE AND EFFICIENT NON-REFLECTING BOUNDARY FOR EULERIAN HYDROD ...

A GOOD MODEL FOR PREDICTING THE CONDUCTION AND OPENING CHARACTERISTICS OF PLASMA OPENING SWITCHES IS REQUIRED IF SWITCH- ES CURRENTLY IN USE ARE TO BE SCALED UP TO THE CURRENT AND VOLTAGE RATINGS REQUIRED BY THE FAMILY OF THREAT SIMULATOR. EMPIRICAL VERIFICATION OF THE NUMEROUS MODELS WHICH HAVE EVOLVED AROUND DIFFERENT CONDUCTION PROCESSES HAVE MET WITH LIMITED SUCCESS BECAUSE SWITCH CHARACTERIST ...