Relativistic BWO With Linearly Polarized Gaussian Radiation Pattern

Author

Elfrgani, Aseim M. ; Prasad, Santasriya ; Fuks, Mikhail I. ; Schamiloglu, Edl

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of New Mexico, Albuquerque, NM, USA

Volume

42

Issue

8

fYear

2014

fDate

Aug. 2014

Firstpage

2135

Lastpage

2140

Abstract

An X-band relativistic backward wave oscillator (BWO) is proposed to provide high-power Gaussian radiation that is attractive for many applications. A Bragg reflector with combined single-fold left- and right-spiral corrugations of its wall was applied to the cathode end of the interaction space. Such a reflector converts the operating backward TM₀₁ -mode of the BWO to the forward TE₁₁-mode with linear polarization that is extracted as a Gaussian microwave beam. Frequency tuning over 6% with radiation power 100-350 MW is achieved by varying the magnitude of the guide magnetic field. Computer simulations were used to analyze BWO operation.

Keywords

Gaussian processes; backward wave oscillators; cathodes; electromagnetic wave polarisation; BWO; Bragg reflector; Gaussian microwave beam extraction; X-band relativistic backward wave oscillator; backward TM₀₁-mode; cathode; forward TE₁₁-mode; frequency tuning; linearly polarized Gaussian radiation pattern; power 100 MW to 350 MW; single-fold left-spiral corrugation; single-fold right-spiral corrugation; wall; Cyclotrons; Electron beams; Magnetic resonance; Microwave oscillators; Tuning; Backward wave oscillator (BWO); Bragg reflector; cyclotron absorption; frequency tuning; linearly polarized; linearly polarized.;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2014.2331345

Filename

6847197