[Table of Contents]

Plasma and Fusion Research

Volume 5, S2091 (2010)

Regular Articles

Numerical Analysis of Slow-Wave Instabilities in an X-Band Sinusoidally Corrugated Waveguide with Coaxial Slow-Wave Structure
Shingo ABE, Kazuo OGURA, Kosuke OTUBO and Hiroki KIMURA
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
(Received 9 December 2009 / Accepted 16 March 2010 / Published 10 December 2010)


The dispersion characteristics and slow-wave instabilities of a sinusoidally corrugated waveguide with coaxial slow-wave structure (SWS) are analyzed. In SWS, a central cylindrical conductor is surrounded by an outer cylindrical conductor. Sinusoidal corrugation is formed on either conductor or both conductors. The corrugation parameters are those used for an X-band SWS. The relative phase between the sinusoidal corrugations on the inner and outer conductors affects the dispersion characteristics. Instabilities due to beam interactions with the slow -waves are examined by considering three-dimensional beam perturbations. The slow cyclotron instability occurs in addition to the Cherenkov instability, since transverse as well as longitudinal perturbations are included.


coaxial slow-wave structure, backward wave oscillator, surface wave, slow cyclotron instability, Cherenkov instability

DOI: 10.1585/pfr.5.S2091


  • [1] K. Ogura et al., Jpn. J. Appl. Phys. 42, 7095 (2003).
  • [2] H. Yamazaki et al., IEEJ Trans. FM. 124, 477 (2004).
  • [3] H. Yamazaki et al., IEEJ Trans. FM. 125, 739 (2005).
  • [4] X. Zheng et al., J. Phys. Soc. Jpn. 64, 1042 (1995).
  • [5] X. Renzhen et al., IEEE Trans. Plasma Sci. 35, 1456 (2007)
  • [6] G. Liu et al., J. Appl. Phys. 103, 093303 (2008).
  • [7] O. Watanabe et al., Phys. Rev. E 63, 056503 (2001).
  • [8] K. Ogura et al., J. Plasma Phys. 72, 905 (2006).

This paper may be cited as follows:

Shingo ABE, Kazuo OGURA, Kosuke OTUBO and Hiroki KIMURA, Plasma Fusion Res. 5, S2091 (2010).