Electromagnetic PIC Simulation of High Power Microwave Sources using Neptune

We present new capabilities in the Neptune electromagnetic particle-in-cell (EM-PIC) simulation code and design environment that support geometry-based design of vacuum electronic and HPM devices. New features of the EM-PIC model include a fully 3D, omnidirectional implementation of the perfectly-ma...

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Published in2024 Joint International Vacuum Electronics Conference and International Vacuum Electron Sources Conference (IVEC + IVESC) pp. 1 - 2
Main Authors Cooke, Simon J., Vlasov, Alexander N., Jabotinski, Vadim J., Petillo, John J., Ovtchinnikov, Serguei G.
Format Conference Proceeding
LanguageEnglish
Published IEEE 23.04.2024
Subjects
Convergence
Current density
Electromagnetic waveguides
Electromagnetics
Electron sources
Microwave theory and techniques
particle-in-cell
perfectly-matched layer
Solid modeling
Surface waves
Three-dimensional displays
Vacuum electronics
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Summary:We present new capabilities in the Neptune electromagnetic particle-in-cell (EM-PIC) simulation code and design environment that support geometry-based design of vacuum electronic and HPM devices. New features of the EM-PIC model include a fully 3D, omnidirectional implementation of the perfectly-matched layer (PML) method that efficiently absorbs outgoing waves, a waveguide port model with time-dependent mode-decomposition diagnostics, and a model for space-charge limited emission from curved (cut-cell) interior surfaces that exhibits second-order convergence of the emitted current density with respect to the grid cell size. Collectively, these capabilities have enabled Neptune to perform 3D simulations of advanced HPM sources. We will summarize the new capabilities and present examples of applications to high power microwave sources.
DOI:10.1109/IVECIVESC60838.2024.10695017