Award Data

The capabilities of modern x-ray light sources have opened up new areas in the study of the temporal evolution of complex materials under dynamic loading, which require detectors with high sensitivity, wide dynamic range at frame rates approaching the bunch repetition rates of modern light sources and detection at x-ray energies above 20keV.However, the capability to do such research is limited by ...

An electromagnetic pulse (EMP) attack could cause widespread outage of the commercial electric power system that could last for weeks to months. Microgrids for defense critical infrastructure (DCI) should thus be equipped to operate in islanded mode for extended periods of time using only local fuel storage and renewable energy sources. The primary difference between operating a microgrid in islan ...

While aluminum casing materials provide some enhanced performance and thermal loading to explosive ordinance, their overall effectiveness is highly limited by incomplete combustion and long residence times. In order to reduce these problems, the casing material must be designed to facilitate rapid fragmentation through either specialized casing geometries or greatly refined initial particle sizes. ...

A new type of compact induction accelerator currently under development at the Lawrence Livermore National Laboratory (LLNL) promises to increase the average accelerating gradient by at least an order of magnitude over that of existing induction machines. The machine is based on the use of high gradient vacuum insulators and advanced dielectric materials and switches. The system, called the Diel ...

Predicting the response of building components to internal detonations is more complex than the corresponding task for external loads because of the more complex loading waveforms which include multiple reflections in the shock phase followed by a long duration pseudostatic loading that depends upon room venting. Add the possibility of additional impulsive loading from primary debris. We propose t ...

In Phase I of this effort we analyzed the structural response of a BLU 109 during typical penetration events. Based on these finite element results, we proposed and demsonstrated a simple robust concept for a passive penetrator sensor that identifies the material being penetrated and also correlates strongly with its underground trajectory. Such a sensor would obviously provide valuable informatio ...

The potential for progressive collapse of buildings damaged by terrorist blasts represents a significant risk to building occupants. There is a need for software tools that assess the potential for progressive collapse of above ground structures. These tools should run quickly and accurately predict the collapsed region of a damaged structure. These tools would be of great value to security pla ...

This proposal describes an approach to meeting DTRA’s goals of improving sensor technology for penetrating weapons. Weidlinger Associates Inc. (WAI) has significant experience in the design and use of ultrasound technologies for a broad range of end-use applications. WAI is also familiar with the terradynamic issues related to penetrators and the targeting aspects through its work in Hard Targ ...

The objective of this research is to develop beta versions of tools for automatically migrating radiation effects predicted in TCAD level tools to compact modeling tools. This transition will enable compact models that possess radiation effects to be quickly generated, which can then be used in circuit design activity. This approach is a substantial improvement over the current ad hoc approaches. ...

The atmospheric transport and dispersion (ATD) model requirements for describing the environmental conditions that are most likely to occur on any given day, called the "typical day", are very unique. The model requirements are unique because the typical day requirements for ATD must be both typical in representing the most likely occurring condition of each variable and be mass-balanced across t ...