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Research has shown that there are several methods by which higher flashover and breakdown voltages of electrical insulating materials can be achieved. While breakdown voltage is predominantly affected by the insulation bulk material, many factors contribute to the flashover performance of an insulator. Such includes material composition, operating environment, interface between current carrying conductor...
This research focuses on the effects of laser annealing on DC surface flashover characteristics of Polymethyl Methacrylate (PMMA) and Polystyrene (PS) dielectric samples. While many factors can contribute to flashover performance of a dielectric, such as insulator parameters, insulator operating environment and the interface between electrode and dielectric, micro scale structures on the surface of...
Summary form only given. The destruction of solid materials by electrical means has only recently come under the scrutiny of research. Ice serves as an especially attractive test medium due to its accessibility, its service as a model solid, and its applicability in real-world problems such as ice-breaking ships or even the extraction of water from possible ice sheets on non-Earth environments. The...
Metallized polypropylene films (MPPF) can serve as an alternate for exploding wires in many applications. Compared to wires, MPPF is more structurally robust and can be shaped more easily for specific applications. If long films are desired, the film can be shaped to fit a variety of geometries. In our experiments, MPPF as along as 13″ have exhibited plasma formation. Experiments were performed to...
The focus of this research is to study mechanisms that constitute ice fracturing via pulsed electric power. Ice serves as an especially attractive test medium due to its accessibility, it use as a model solid, and its applicability in real-world problems such as ice-breaking ships or the extraction of water from possible ice sheets on non-Earth environments. The experiments described herein utilize...
One of the factors that contributes to surface flashover on dielectrics is the existence of defects on the surface of the material. For our studies, excimer laser processing was utilized on alumina dielectrics in an attempt to substantially increase the threshold voltages for flashover. Through excimer laser processing, the surface material melts and re-crystallizes to form a uniform surface structure...
The exploding wire phenomenon is well researched due to its vast and practical applications which include, but are not limited to, shock wave generation, pulsed power, Z pinch physics, plasma ignition, fuses, and fusing applications. However, the focus of this research is on a surrogate for exploding wires. In this research, metallized capacitor grade-polypropylene film was used as an alternative...
The Energy Systems Institute is currently performing pulsed-power flashover research on thin films arranged in various geometries. Currently the research is focused on the power transfer characteristics of the film, which consists of a polypropylene layer with a thin aluminum coating on it. It is also known that the surface arcing that occurs when an appropriate electrical pulse is applied to the...
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