Operation of a 500 kV, 4 kA Marx generator at 500 Hz rep-rate

M. B. Taylor, P. M. Kelly, J. M. Parson, C. Lynn, J. C. Dickens, A. A. Neuber, J. J. Mankowski, J. W.B. Bragg, S. Calico, M. Scott

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

2 Scopus citations

Abstract

A 42 J, 10-stage pulse forming network (PFN) Marx generator capable of producing a 500 kV, 50 ns full-width-half-max (FWHM), ∼5 ns rise time pulse into an open load at a rep-rate of 500 Hz has been designed for use as a pulsed power source for a reflex triode virtual cathode oscillator (vircator). Rayleigh PFNs are used in place of discrete capacitors for each stage of the 10-stage Marx generator. Effort was taken to minimize parasitic inductance such that the quality of the pulse shape is maintained as much as possible. In order to rep-rate the Marx generator, a trigatron-based triggering scheme is used to initiate erection of the Marx generator. A 20 ns risetime, 24 kV solid-state pulse trigger generator capable of operating at high repetition rates is used to drive the trigatron. The required charge rate for a 500 Hz pulse repetition frequency (PRF) for the Marx generator is 24 kW. Repetitive operation requires additional design considerations that would be irrelevant to single pulse firing. Pressurized air is jetted across the spark gaps by means of built-in gas manifolds to remove remaining ionized gas between each pulse and prevent premature erection during the subsequent charging cycle. The built-in gas manifolds were designed using a hydrodynamic simulation to ensure equal flow rate across each of the spark gaps and equal pressure along the length of the tube chamber.

Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014
EditorsAllen L. Garner
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages377-379
Number of pages3
ISBN (Electronic)9781467373234
DOIs
StatePublished - Oct 1 2015
EventIEEE International Power Modulator and High Voltage Conference, IPMHVC 2014 - Santa Fe, United States
Duration: Jun 1 2014Jun 5 2014

Publication series

NameProceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014

Conference

ConferenceIEEE International Power Modulator and High Voltage Conference, IPMHVC 2014
CountryUnited States
CitySanta Fe
Period06/1/1406/5/14

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    Taylor, M. B., Kelly, P. M., Parson, J. M., Lynn, C., Dickens, J. C., Neuber, A. A., Mankowski, J. J., Bragg, J. W. B., Calico, S., & Scott, M. (2015). Operation of a 500 kV, 4 kA Marx generator at 500 Hz rep-rate. In A. L. Garner (Ed.), Proceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014 (pp. 377-379). [7287288] (Proceedings of the 2014 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IPMHVC.2014.7287288