NDLI: Production of high power microwaves with a compact Marx generator

Content Provider	IEEE Xplore Digital Library
Author	Gardelle, J. Cassany, B. Desanlis, T. Modin, P. Donohue, J.T.
Copyright Year	2004
Description	Author affiliation: CEA, Le Barp, France (Gardelle, J.; Cassany, B.; Desanlis, T.; Modin, P.)
Abstract	Summary form only given. A compact pulsed power system has been built at CESTA to drive low impedance high power microwave (HPM) sources. This system stores 10 kJ and is capable of delivering a current up to 50 kA at 800 kV to a matched load. The rise time of the current is less than 100 ns. We have coupled the Marx generator with a vircator tube that produces HPM in S-band. In this paper we describe the experimental setup, the associated HPM measurements and the results obtained with the simulation code MAGIC. The utilization of a fast oscilloscope (3 GHz bandwidth) enables us to examine in detail the frequency spectrum of the Vircator radiation. The spectra are time resolved with a window-shifted finite Fourier transform method. Standard calibrated horns are placed at appropriate locations in the far-field radiation pattern. Precise knowledge of the attenuation of the diagnostic lines associated with the variation with frequency of the radiation pattern allows us to measure the radiated power. The low efficiency generally observed in a basic Vircator configuration can be improved by placing a frequency-matched cavity downstream from the anode. The corresponding TM01 mode can then be made preponderant by a correct choice of the length and radius of the beam pipe that precedes the large conical radiating horn.
Sponsorship	Plasma Sci. and Applications Committee of the IEEE Nuclear and Plasma Sci. Soc
File Size	51944
File Format	PDF
ISBN	0780383346
ISSN	07309244
DOI	10.1109/PLASMA.2004.1339933
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Production High power microwave generation Microwave generation Power generation Frequency Pulse power systems Impedance Oscilloscopes Bandwidth Fourier transforms
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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