CST Particle-In-Cell Modeling of A Tunable Reflex-Triode Vircator

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

Abstract

This study serves to describe three-dimensional particle-in-cell (PIC) simulations of a tunable reflex-Triode virtual cathode oscillator (vircator). Experimental data from the compact hard-Tube reflex-Triode vircator developed at Texas Tech University (TTU) is used to validate simulated results. The vircator developed at TTU is capable of burst-mode operation at pulse repetition rates (PRFs) up to 100 Hz for a period of one second. A pulse energy of 158 J drives the vircator, and 600 kV (open circuit) pulse forming network (PFN) based Marx generator. The vircator is comprised of a bimodal, carbon fiber cathode and a pyrolytic graphite anode, with the ability to quickly change the distance between the anode-cathode (A-K) gap, back wall distance, and bottom plate distance between experiments. The PIC simulations have been performed using CST PIC Solver, by Dassault Systemes. The models detail virtual cathode formation and the subsequent extraction of radiated microwave power for a variety of cavity geometries. A working three-dimensional, relativistic, electromagnetic, particle-in-cell model of a vircator allows for quick, pre dictive results relative to building an experimental setup. The model is used to determine the necessary driving voltages, A-K gap distances, and cathode current densities to extract microwave radiation at a desired. Simulated results aid in identifying mode contributions. Voltage, current, and microwave data are presented and compared against experimental results at different operating conditions.

Original languageEnglish
Title of host publication2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages133-135
Number of pages3
ISBN (Electronic)9781538654538
DOIs
StatePublished - Jun 2018
Event2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018 - Jackson, United States
Duration: Jun 3 2018Jun 7 2018

Publication series

Name2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018

Conference

Conference2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018
CountryUnited States
CityJackson
Period06/3/1806/7/18

Keywords

  • Microwaves
  • PIC
  • Vircator

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    Barnett, D. H., Neuber, A. A., Dickens, J. C., & Mankowski, J. J. (2018). CST Particle-In-Cell Modeling of A Tunable Reflex-Triode Vircator. In 2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018 (pp. 133-135). [8936727] (2018 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IPMHVC.2018.8936727