High-efficiency relativistic backward wave oscillator: theory and design

Backward wave oscillators (BWOs) driven by high-current relativistic electron beams are capable of producing high-power coherent radiation in the centimeter and millimeter wavelength regions. However, the efficiency of these devices is usually limited to 15-20% when a homogeneous slow-wave structure...

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Bibliographic Details
Published in:IEEE transactions on plasma science 1996-06, Vol.24 (3), p.843-851
Main Authors: Levush, B., Antonsen, T.M., Vlasov, A.N., Nusinovich, G.S., Miller, S.M., Carmel, Y., Granatstein, V.L., Destler, W.W., Bromborsky, A., Schlesiger, C., Abe, D.K., Ludeking, L.
Format: Article
Language:English
Subjects:
Acceleration
Electromagnetic scattering
Electron beams
Laboratories
Magnetic analysis
Magnetic field measurement
Magnetic fields
Millimeter wave technology
Oscillators
Radio frequency
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Summary:Backward wave oscillators (BWOs) driven by high-current relativistic electron beams are capable of producing high-power coherent radiation in the centimeter and millimeter wavelength regions. However, the efficiency of these devices is usually limited to 15-20% when a homogeneous slow-wave structure is used. Utilizing a two-section slow-wave structure, where the spatial period of the second section is larger than that of the first section, a BWO efficiency of greater than 50% was calculated. A conceptual design of a high-efficiency S-band BWO driven by a 500-kV 5-kA electron beam has been developed and analyzed.
ISSN:0093-3813
1939-9375
DOI:10.1109/27.533087