Award Data

A compact laser driver will allow photoconductive semiconductor switches to be used in small EMP simulator "building blocks" (EMPBB). Combined with a battery powered on-board pulsed power system, these EMPBBs will allow the construction of flexible EMP test facilities with nothing more than a single fiber optic timing connection to each EMPBB.

This work advances the state-of-the-art in high-speed diagnostics for the characterization of fireballs, hot gases, and aerosols released by explosives detonation.The proposed advancement is the development of an integrated optical sensor suite, selected from technologies which are already in development in the portfolio of the proposers.The sensor suite will include PIV, PLIF, and LIBS instrument ...

Handheld radioisotope identification instruments (RIIDs) are an important, front-line tool for passively detecting, locating, and characterizing radioactive materials and thereby helping to prevent the spread of illicit nuclear materials. Border patrol, customs, and law enforcement personnel, along with warfighters, demand an enhanced, more sensitive RIID capable of integrated gamma and neutron de ...

The nuclear weapons community has traditionally focused on the next generation or level of weapon capability complimented by gathering and analysis of actual test data. Now, with the cessation of actual weapons testing, there is an increased need to use the actual test data in modeling techniques to better understand the phenomenology and potential effects of nuclear weapons. The first phase of ...

DEVELOPMENT OF AN INNOVATIVE AND ECONOMICAL EXPERIMENTAL METHOD IS PROPOSED WHICH CAN PROVIDE THE BASIC BEHAVIOR DATA NECESSARY TO MEET THE DNA OBJECTIVE OF PROVIDING ADEQUATE ANALYSIS, DESIGN AND ASSESSMENT METHODS FOR MINIMALLY HARDENED TUNNELS. THIS DEVELOPMENT IS ACCOMPANIED BY ANALYSIS CAPABLE OF REPRESENTING THE COMPLEX INELASTIC MATERIAL BEHAVIOR OF THE ROCK MASS AND OF REPRESENTING SIMPLE ...

Turbulence of gas flows by its very nature is one of the most difficult things to model and measure. We propose to develop a new way of measuring the turbulence and to compare these measurements to predictions using the k-epsilon model. Typical measurements, in the past, use smoke, Schlierin or shadow graph techniques to visually infer turbulence characteristics. These features are either motio ...

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WE PROPOSE TO PROVE THE SCIENTIFIC AND TECHNICAL FEASIBILITY TO USE ELECTROSTATIC ACCELERATION TO BOOST THE ENERGY OF CF-252 FISSION FRAGMENTS AS A LABORATORY SIMULATION OF COSMIC RAY EFFECTS I MICROELECTRONICS. THE PROJECT OBJECTIVE IS TO BOOST THE ENERGY SUCH THAT A LARGE FRACTION OF THE ACCELERATED IONS HAVE A RANGE IN SILICON GRATER THAN 20 MICROMETERS. THIS SOLVES A NUMBER OF PROBLEMS ASSOCIA ...

THIS DOCUMENT PROPOSES RESEARCH ON THE FABRICATION OF A FAMILY OF EMP HARDENED CONNECTORS AND CABLE HARDWARE FOR AIRCRAFT AND SHIPBOARD APPLICATIONS. THESE CONNECTORS AND CABLE HARDWARE WOULD SUPPRESS EMP TRANSIENTS THROUGH THE INTEGRAL INCORPORATION OF A THIN FILM, HIGH SPEED, HIGH CURRENT OVONIC THRESHOLD SWITCH (OTS). CABLES AND HARDWARE OF THIS TYPE WOULD SIGNIFICANTLY INCREASE THE SURVIVABILI ...

Survival of present day microelectronic circuits depends on their protection from self generated and external electromagnetic interference. This proposal is oriented toward the class of interference generally referred to as overvoltage transients. Means for mitigating these transients include gas discharge tubes, and various solid state devices. Each of these has their own advantages in particu ...