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Applied Physics Letters / Volume 91 / Issue 22 / PLASMAS AND ELECTRICAL DISCHARGES

Appl. Phys. Lett. 91, 221506 (2007); http://dx.doi.org/10.1063/1.2819075 (2 pages)

Reduce the start current of Smith-Purcell backward wave oscillator by sidewall grating

D. Li1, K. Imasaki1, X. Gao2, Z. Yang2, and Gun-Sik Park3

1Institute for Laser Technology, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
2Institute of High-Energy Electronics, University of Electronic Science and Technology of China, Chengdu 610054, People’s Republic of China
3School of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

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(Received 26 September 2007; accepted 8 November 2007; published online 29 November 2007)

A sidewall grating for the Smith-Purcell device is proposed to enhance the coupling of the optical mode with the electron beam and, consequently, relax the stringent requirements to the electron beam. With the help of three-dimensional particle-in-cell simulations, it has been shown that, comparing with the general grating, the usage of a sidewall grating improves the growth rate and dramatically shortens the time for the device to reach saturation. It is also found that the sidewall grating holds the potential to reduce the start current for the operation of a Smith-Purcell backward wave oscillator.

© 2007 American Institute of Physics

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KEYWORDS and PACS

Keywords

backward wave oscillators, electron beams

PACS

  • 41.75.Fr

    Electron and positron beams

  • 84.40.Fe

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

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2819075

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

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

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