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Physics of Plasmas / Volume 19 / Issue 2 / LETTERS

Phys. Plasmas 19, 020704 (2012); http://dx.doi.org/10.1063/1.3686138 (4 pages)

High-frequency devices with weakly relativistic hollow thin-wall electron beams

V. L. Bratman, A. E. Fedotov, and P. B. Makhalov

Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia

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(Received 9 November 2011; accepted 23 January 2012; published online 15 February 2012)

Slow-wave devices with hollow electron beams and azimuthally symmetric corrugated operating waveguides can be very effective not only for relativistic but also weakly relativistic particle energies. In the weakly relativistic case, the use of hollow beams permits a significant increase in the diameter of the beam channel and, simultaneously, a drastic decrease in the required current density and heat load at the interaction structure wall in comparison with the conventional devices, which basically exploit thin pencil-like beams. Advantages of the hollow beams in the achievement of continuous wave (CW) and long-pulse generation can manifest themselves in a wide range from gigahertz to terahertz frequencies. As an example of the concept, a W-band oscillator (orotron) with kilowatt output power in CW regime is discussed in detail. Modification of the microwave system makes it possible to implement high-power frequency-tunable BWOs, klystron or TWT amplifiers, and many types of hybrid devices.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. THE CONCEPT OF A HOLLOW-BEAM WEAKLY RELATIVISTIC DEVICE
    1. W-band device
    2. Ka-band device
    3. Prospects at sub-terahertz frequencies
  3. CONCLUSION

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KEYWORDS, PACS, and IPC

Keywords

current density, microwave generation, microwave tubes, plasma filled waveguides, relativistic electron beams, slow wave structures

PACS

  • 84.40.Fe

    Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)

  • 84.40.Az

    Waveguides, transmission lines, striplines

International Patent Classification (IPC)

  • H01J23/00

    Details of transit-time tubes of the types covered by group H01J25/00

  • H01J25/00

    Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons

  • H01P3/00

    Waveguides; Transmission lines of the waveguide type

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3686138

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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