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Expansion of a Surface Flashover Plasma
IEEE Transactions on Plasma Science, 2013A strong electric field applied parallel to the surface of a dielectric in vacuum can lead to the formation of a vacuum surface flashover discharge, which will produce light, neutral gas, and plasma. Plasma formed in this way can be used for a number of applications, including as a source of electrons, but the plasma's expansion away from the discharge
John R. Harris +2 more
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Mechanism of vacuum flashover on surface roughness
Journal of Physics D: Applied Physics, 2019An investigation is conducted regarding the influence of surface roughness on the flashover strength of an insulator in vacuum. A series of experiments is first presented, showing the relationship between surface roughness and flashover voltage, combined with measurement of surface potential distribution.
Bao-Hong Guo +7 more
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A tutorial on vacuum surface flashover
IEEE Transactions on Plasma Science, 2018This paper is based on a tutorial presented by the author as a part of the Minicourse on charged particle beams and high-powered pulsed sources given at the 2017 International Conference on Plasma Sciences at Atlantic City, NJ, USA. It is intended to provide a brief overview of the phenomenology and physics of the vacuum surface flashover process ...
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Advanced imaging of pulsed atmospheric surface flashover
2011 IEEE Pulsed Power Conference, 2011Vacuum Ultraviolet (VUV) radiation is commonly thought to enhance streamer formation, as it is energetic enough to cause photoionization in the gaseous volume. Light with wavelengths below 180 nm, i.e. VUV, is highly absorbed in the atmosphere which increases the difficulty of measuring any VUV emission from gaseous breakdown at atmospheric pressure ...
A. Fierro +4 more
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Charge transport dynamics in surface flashover arcs
IEEE 1989 International Conference on Plasma Science, 1989Charge transport in a surface flashover arc has been analyzed using a transmission line model. The generator is a charge spot whose capacitance is taken to be large compared to the capacitance of the charge path. Resistance per unit length, R, is assumed to satisfy a local arc welder's ansatz, R mod I mod =E.*, where I is the local current and E* is a ...
A. Kadish, null Maier, R.T. Robiscoe
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A mechanism for surface flashover of semiconductors
7th Pulsed Power Conference, 2005Photoconductive and other types of semiconductor switches hold great promise for use in high voltage switching applications requiring reliability, light weight, and system simplicity. At present, the utility of these devices is sharply limited by the occurrence of surface flashover at the semiconductor-ambient interface at voltages roughly an order of ...
P.F. Williams, F.E. Peterkin
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Surface Flashover ARC Orientation on Mylar Film
IEEE Transactions on Nuclear Science, 1981A study of the arc discharge patterns and resultant damage patterns on thin Mylar films exposed to a 20 keV electron beam is described. In particular, it is established that there is a broad directional correlation among the directions associated with visible linear arcs, damage tracks, the "slow" optical direction and the longitudinal marks left on ...
M. Gossland +2 more
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Pulsed Unipolar Surface Flashover at Atmospheric Conditions
Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium, 2006Dielectric surface flashover along insulators in vacuum has been comprehensively researched over the years. However, the primary mechanisms involved in dielectric flashover at atmospheric pressures have yet to be as extensively analyzed with variable parameters such as electrode geometry, background gas, humidity, and temporal characteristics of the ...
K. Morales +4 more
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Dynamic modeling of flashover on dielectric surfaces
[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials, 2002The authors present the results of a dynamic model developed to estimate the pollution flashover voltage (FOV) for various types of practical insulator configurations. The model uses established concepts readily available for computation. For the illustration of the model, the computed results are compared with the experimental data of other ...
R. Sundararajan, R.S. Gorur
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Surface flashovers on metal-oxide varistor blocks
ICSD'98. Proceedings of the 1998 IEEE 6th International Conference on Conduction and Breakdown in Solid Dielectrics (Cat. No.98CH36132), 2002Extensive studies have been made of surface flashovers on varistor blocks using multipulse (MP) currents which simulate multiple stroke lightning ground flashes. The MP results are compared with those obtained with single-pulse (SP) currents and with high temporary overvoltages (TOV) at 50 Hz. The blocks used were mostly of 5 kA rating as commonly used
M. Darveniza, T.K. Saha
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