[Table of Contents]

Plasma and Fusion Research

Volume 2, S1041 (2007)

Regular Articles

Weakly Relativistic K-Band Oversized Backward Wave Oscillator with Bragg Reflector at Beam Entrance of Slow Wave Structure
Kazuo OGURA, Yushi MIYAZAWA, Hidekazu TANAKA, Yutaka KIUCHI, Satoshi AOYAMA and Akira SUGAWARA
Graduate School of Science and Technology, Niigata University, Niigata, 950-2055, Japan
(Received 4 December 2006 / Accepted 26 February 2007 / Published 20 November 2007)

Abstract

We report an oversized K-band backward wave oscillator (BWO) operating above 20 GHz in the weakly relativistic region less than 100 kV. It is very important to prevent microwave from going into the beam diode, since intense microwaves will harmfully affect beam generation. A weakly relativistic oversized BWO is demonstrated using a Bragg reflector at the beam entrance of slow wave structure (SWS). The effect of the Bragg reflector on the BWO operation is examined, by changing the boundary condition at the beam entrance. The Bragg reflector improves the performance of the oversized BWO.

Keywords

oversized backward wave oscillator, periodic slow wave structure, weakly relativistic electron beam, K-band, Bragg reflector

DOI: 10.1585/pfr.2.S1041

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References

  • [1] R.J. Barker and E. Schamiloglu, High-Power Microwave Sources and Technologies (IEEE Press, New York, 2001).
  • [2] S.P. Bugaev et al., IEEE Trans. Plasma Sci. 18, 518 (1990).
  • [3] S.P. Bugaev et al., IEEE Trans. Plasma Sci. 18, 525 (1990).
  • [4] M.R. Amin et al., J. Phys. Soc. Jpn. 64, 4473 (1995).
  • [5] K. Ogura et al., Phys. Rev. E 53, 2726 (1996).
  • [6] A.N. Vlasov et al., IEEE Trans. Plasma Sci. 28, 550 (2000).
  • [7] K. Ogura et al., J. Plasma Fusion Res. SERIES 6, 703 (2004).
  • [8] K. Ogura et al., IEEJ Trans. FM 125, 733 (2005).
  • [9] S. Aoyama et al., Trans. Fusion Sci. Tech. 51, 325 (2007).
  • [10] K. Minami et al., IEEE Trans. Plasma Sci. 23, 124 (1995).
  • [11] M.R. Amin et al., J. Phys. Soc. Jpn. 65, 627 (1996).
  • [12] S. Kobayashi et al., IEEE Trans. Microwave Theory Tech. 26, 947 (1998).
  • [13] L.D. Moreland et al., IEEE Trans. Plasma Sci. 24, 852 (1996).

This paper may be cited as follows:

Kazuo OGURA, Yushi MIYAZAWA, Hidekazu TANAKA, Yutaka KIUCHI, Satoshi AOYAMA and Akira SUGAWARA, Plasma Fusion Res. 2, S1041 (2007).