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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Exploring the basic physical mechanisms of cathode and anode directed high voltage surface flashover.
Abstract not provided.
Study of Anode-Initiated Surface Flashover in Vacuum with Spatiotemporally Resolved Optical Emission Spectroscopy.
Abstract not provided.
Electrical diagnostics and nanosecond imaging of vacuum surface flashover.
Abstract not provided.
Electrical diagnostics and nanosecond imaging of vacuum surface flashover.
Abstract not provided.
Study of anode-initiated surface flashover in vacuum with spatiotemporally resolved optical emission spectroscopy.
Abstract not provided.
Mechanisms of Anode-Initiated Vacuum Insulator Flashover for Pulsed Power Applications.
Abstract not provided.
Poly(dicyclopentadiene) (pDCPD) Coatings for the Mitigation of Surface Flashover in Gas Switch Housings.
Abstract not provided.
Vacuum Insulator Flashover Physics LDRD Report
Large, pulsed power and high voltage systems often employ a stack of insulators to separate a vacuum section away from water or oil sections. The size of this insulator stack often drives overall costs and feasibility of these systems. An electric breakdown along the insulator surface is a primary failure mechanism and is especially impactful if it occurs while power is still being delivered downstream. This report describes a set of experimental and modeling investigations into the cause of these breakdowns, especially focusing on the much less well-understood anode-initiated breakdowns that occur during early parts of power delivery. Additionally, new diagnostics for assessing relevant material properties and behavior of insulators are described. These results describe breakdown behavior and evolution at new temporal and spatial fidelities and provide hypotheses and some answers as to how these breakdowns can occur. This new understanding of the roles of different physics phenomena guide modifications and trade-offs in generating newer insulator stack designs that are smaller and/or have higher electrical stress thresholds.
Investigations of Vacuum Insulator Flashover in Pulsed Power Systems
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Progress Understanding Anode-Initiated Vacuum Insulator Flashover
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Composite Insulator Materials for Vacuum Flashover Holdoff
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Conductivity and Vacuum Flashover Measurements on Composite Materials using a Pulsed-Power Test Stand
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Modeling Anode-Initiated Vacuum Insulator Flashover
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Investigating Vacuum Flashover performance of Rexolite and acrylic before and after applying novel insulator cleaning techniques
Presentation at PPPS 2025, Berlin, Germany
Multi-Fiber Fast Framing Camera for Vacuum Flashover Imaging
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Surface Flashover Across a Polyurethane Barrier Separating Oil and Water Dielectrics
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