Award Data

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 ...

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 ...

PLASMA OPENING SWITCHES (POS) ARE WIDELY USED FOR CURRENT COMPRESSION AND OWER AMPLIFICATION IN INDUCTIVE ENERGY STORE PULSE POWER SYSTEMS. FLASHBOARD PLASMA SOURCES ARE WIDELY USED AS PLASMA INJECTORS IN THESE POS'S. THE FLASHBOARD PLASMA IS PRODUCED BY SURFACE BREAKDOWN ON AN INSULATOR IN VACUUM. SINCE THE SURFACE CONDITIONS DEPEND ON THE PREVIOUS HISTORY, THE RESULTING PLASMA IS NOT UNIFORM, RE ...

The current distribution in plasma radiation sources is both a yardstick for measuring the coupling efficiency of the generator, and a means of studying the implosion dynamics of the load. Since the current distribution cannot be directly measured, it must be deduced from the magnetic field profile. Magnetic field distributions, based on the Faraday rotation of polarized laser light, are typical ...

The magnetic field distribution in a Z-pinch, can be used to infer the currentsflowing in the pinch and study the stability during the implosion phase. Faradayrotation techniques are too insensitive for measurements during the run-in phase.Similarly, it is difficult to infer the Zeeman splitting from spectrally resolvedline profile when the splitting is much less than the absorption line width d.H ...

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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 ...

A piezoelectric polymer gauge is proposed as a Radiation Output Monitor to characterize and ,Monitor the soft (

The Ktech Team proposes a feasibility study of a fuel/air driven flux compression power unit (FCPU) for electric guns. Through variations of inductance gradients and through changes in scale, the proposed technology will be applicable to both electrothermal/chemical and electromagnetic guns. In the Phase 1 effort, we develop simulation models to predict the performance of the flux compression po ...

Science based assessments of the response of systems and material to hostile nuclear environments require detailed verified material response and failure criteria for confident results. Consequently there is a need for the development of experimentaltechniques to measure low pressure equation of state parameters accurately and economically using radiation simulators. The development of a soft x- ...