Los Alamos High-Power Microwave Source Development: The Resonant-Cavity Virtual Cathode And The Large-Orbit Gyrotron

M. V. Fazio; R. F. Hoeberling; J. Kinross-Wright; F. VanHaaften

doi:10.1117/12.951791

25 July 1989 Los Alamos High-Power Microwave Source Development: The Resonant-Cavity Virtual Cathode And The Large-Orbit Gyrotron

M. V. Fazio, R. F. Hoeberling, J. Kinross-Wright, F. VanHaaften

Author Affiliations +

Proceedings Volume 1061, Microwave and Particle Beam Sources and Directed Energy Concepts; (1989) https://doi.org/10.1117/12.951791
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

The need for new, very intense microwave sources has been stimulated by the requirements for high-power phased arrays, vulnerability and effects tests sources, and the next generation of particle accelerators including the proposed linear colliders. All of these applications place stringent demands on the microwave source in addition to high power, including frequency and phase stability, efficiency, and long pulse ( > 1 μs) repetitive operation. Los Alamos is working on the resonant-cavity virtual cathode source and the large-orbit gyrotron in an attempt to experimentally address some of these issues. The resonant-cavity virtual cathode research has succeeded in demonstrating single-mode, narrow-band operation by surrounding the oscillating virtual cathode with a resonant-cavity structure. An experimental effort to injection lock the oscillating virtual cathode to a low-power injected signal is currently underway. The large-orbit gyrotron research is directed toward developing a technique for efficiently coupling the microwave output power into rectangular wave-guide. A 1-MV, 20-kA modulator with a 1-μs pulse length and a 5-Hz pulse repetition frequency (prf) has been designed and is currently in development; it will be used to drive a repetitively pulsed large-orbit gyrotron. The overall experimental effort is described and current experimental results are discussed.

Citation Download Citation

M. V. Fazio, R. F. Hoeberling, J. Kinross-Wright, and F. VanHaaften "Los Alamos High-Power Microwave Source Development: The Resonant-Cavity Virtual Cathode And The Large-Orbit Gyrotron", Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); https://doi.org/10.1117/12.951791

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KEYWORDS

Microwave radiation

Modulators

Electron beams

Waveguides

Oscillators

Diodes

Directed energy weapons

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