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Time-Domain Full-Wave Modeling of Nonlinear Air Breakdown in High-Power Microwave Devices and Systems

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University of Illinois Center for Computational Electromagnetics Urbana United States

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This final report describes the effort to develop a discontinuous Galerkin time-domain DGTD method in the simulation of high-power microwave air breakdown phenomena, which are modeled by a coupled electromagnetic--plasma system. In the coupled system, the electromagnetic fields are governed by Maxwells equations and the plasma is modeled by the five moment fluid equations Eulers equations. The non-Maxwellian electron energy distribution function EEDF is used to calculate electron transport coefficients and describe the non-equilibrium collision reactions between electrons and neutral air particles. The coupled Maxwell--Euler equations are solved by the DGTD method with high-order spatial and temporal discretizations, which are able to provide a sufficient resolution for the physical quantities in both space and time. Several numerical examples are presented to investigate the physical process and demonstrate the capability of the numerical method.

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Technical Report,31 Aug 2016,31 Aug 2017



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Approved For Public Release;

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