Particle simulation of ultrafast closing switch at sub-atmospheric pressures

Jordan Chaparro, Hermann Krompholz, Andreas Neuber, Lynn Hatfield

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

1 Scopus citations

Abstract

Previous research at Texas Tech University has been conducted on the physics governing highly over-voltaged gas breakdown resulting from ultrafast applied voltage pulses with risetimes less than 200 ps and durations less than 400 ps. Experimental results have shown that the breakdown characteristics of such events significantly differ from those observed in standard gas breakdown and a complete understanding of the physics behind ultrafast discharges is far from being clear. As a companion to experimental work, a numerical model is an attractive means of discerning more about the underlying physics behind such events. In this paper, a relativistic, Particle in Cell model utilizing Monte-Carlo calculations is discussed as a way to directly simulate the experimental conditions, with similar geometry, background gas, and pulse characteristics. Diagnostic output from the simulation includes space-charge development over time, field and particle energy distributions, and particle number growth rates and spatial distributions. An overview of the structure and formulation behind the simulation code is given followed by a comparison of output data to experimental results. Specific points of interest for comparison include formative and statistical delay times, examination of inhomogeneous ionization regions in the discharge, and the behavior of high-energy particles in the runaway state.

Original languageEnglish
Title of host publicationProceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC
Pages499-502
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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    Chaparro, J., Krompholz, H., Neuber, A., & Hatfield, L. (2008). Particle simulation of ultrafast closing switch at sub-atmospheric pressures. In Proceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC (pp. 499-502). [4743700] (Proceedings of the 2008 IEEE International Power Modulators and High Voltage Conference, PMHVC). https://doi.org/10.1109/IPMC.2008.4743700