Window flashover initiation under pulsed microwave excitation

J. Krile, G. Edmiston, J. Dickens, H. Krompholz, A. Neuber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Surface flashover development at the output window of high power microwave (HPM) systems presents a major limitation to the power densities and pulse lengths transmitted through these interfaces. As a result, developing a physical model accurate in predicting surface flashover initiation is of prime interest. A Monte-Carlo type electron motion simulation has been developed to estimate the delay time from initial electron to flashover. Although this approach has shown reasonable agreement with experimental results, the process yielding the initial seed electron(s) was neglected in the model, primarily due to the lack of quantitative and qualitative information on seed electron production. For instance, computational efforts investigating seed electron production via collisional detachment from negative oxygen ions have shown that while effective at DC, the collisional detachment model cannot remain a likely contributor of electrons at high frequencies (gt; sim;5 GHz). The key parameters impacting high power microwave surface flashover will be discussed and presented along with continued investigation into the statistics of possible seed electron sources, including trace contaminates present in the gas or on the dielectric surface.

Original languageEnglish
Title of host publicationProceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC
Pages560-563
Number of pages4
DOIs
StatePublished - 2008
Event2008 IEEE International Power Modulators and High Voltage Conference, PMHVC - Las Vegas, NV, United States
Duration: May 27 2008May 31 2008

Publication series

NameProceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC

Conference

Conference2008 IEEE International Power Modulators and High Voltage Conference, PMHVC
CountryUnited States
CityLas Vegas, NV
Period05/27/0805/31/08

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    Krile, J., Edmiston, G., Dickens, J., Krompholz, H., & Neuber, A. (2008). Window flashover initiation under pulsed microwave excitation. In Proceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC (pp. 560-563). [4743719] (Proceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC). https://doi.org/10.1109/IPMC.2008.4743719