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Impulse Surface Charging and Flashover
1991In compressed-gas-insulated equipment, the weakest point in the system is often at the interface between the gas (usually SF6) and the solid spacers used to support the conductors1. The low dielectric strength is often attributed to the effects of surface charges, or to ionisation at high-field sites such as the gas-electrode-spacer “triple junction”2 ...
Owen Farish, Ibrahim Al-Bawy
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Mechanism for SGEMP-Triggered Surface Flashover
IEEE Transactions on Nuclear Science, 1979A mechanism for simultaneous flashover of an array of dielectric surfaces is proposed. The timescale and current level of the resultant discharge are evaluated, and consequences for SGEMP response are discussed.
M. J. Mandell +4 more
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Vacuum surface flashover: experiments and simulations
IEEE Transactions on Dielectrics and Electrical Insulation, 2014It is conjectured that vacuum dielectric surface flashover can be avoided by preventing its initiation. Assuming that the flashover process is initiated by the impact of charged particles on the insulator surface, by deflecting these away from the surface, the development of a flashover avalanche can be repressed.
J. Z. Gleizer +3 more
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Vacuum surface flashover from bipolar stress
Journal of Applied Physics, 1985A simple model is employed to explain the anomalous surface-flashover characteristics observed when insulators in vacuum are stressed with bipolar voltage waveforms. Under unipolar stress, the flashover field is found to vary as the inverse square root of the prebreakdown time delay over the first few tens of nanoseconds, thereafter becoming less ...
R. A. Anderson, W. K. Tucker
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Photoconductive Switches Vacuum Surface Flashover Improvements
Eighth IEEE International Conference on Pulsed Power, 2005Photoconductive semiconductor switches (PCSS) presently have the greatest potential for dramatic performance enhancements for high power pulsed applications. However, surface flashover severely limits the maximum stand off voltage in the open state. We report the use of a novel technique to PCSS to overcome this limitation.
J.M. Elizondo, W.M. Moeny
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Surface flashover in silicon-vacuum systems
IEEE Transactions on Electrical Insulation, 1993The properties of the prebreakdown response of silicon-vacuum systems under HV excitation are presented. The most frequent case of system breakdown by surface flashover is treated. The particular properties of the system response in the high-field pulsed regime demonstrate the essential differences between the silicon-vacuum and solid-insulator-vacuum ...
G. Gradinaru +2 more
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Inhibiting surface flashover with magnetic fields
Proceedings of the 24th Intersociety Energy Conversion Engineering Conference, 2003The influence of magnetic fields on dielectric surface flashover is investigated for simple geometries and a variety of parameters (different dielectric materials, presence of ambient gas and plasma). Models based on the saturated secondary electron avalanche predict that magnetic insulation starts at the lowest amplitudes of the magnetic field if the ...
R. Korzekwa +3 more
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Composition of a surface flashover plasma
1990 Plasma Science IEEE Conference Record - Abstracts, 1990Summary form only given, as follows. The composition of the plasma used as an electron source for the Plasma Edge Cathode experiment has been determined. A time-of-flight spectrometer was constructed for this purpose. The plasma is produced by the surface flashover of a coaxially arranged dielectric composed of alumina primarily.
D.E. Buraczyk, K.W. Zieher
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Estimation of surface flashover threshold in a vacuum II: flashover phase transition
Journal of Physics D: Applied Physics, 2019Surface discharge in vacuum occurs under intense external field, also called flashover. The flashover threshold over which surface flashover occurs is of vital importance in vacuum-solid interface. It is widely assumed that flashover is initiated by single surface multipactor and develops as a plasma discharge along dielectric surface, namely secondary
Guang-Yu Sun +7 more
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Surface flashover strength in supercritical helium
Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1980, 1980Table 1 shows the surface flashover fields and their standard deviations in the liquid and supercritical helium. According to the authors' experiments,3 the flashover fields of the liquid and supercritical helium for dc voltage are 27 MV m−1 and 55 MV m−1, respectively.
I. Ishii, T. Noguchi
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