Title :
An X-band gigawatt amplifier
Author :
Abubakirov, Edward B. ; Denisenko, Andrew N. ; Fuks, Mikhail I. ; Kolganov, Nikolay G. ; Kovalev, Nikolay F. ; Petelin, Mikhail I. ; Savelyev, Alexander V. ; Schamiloglu, Edl ; Soluyanov, Eugeny I. ; Yastrebov, Vladimir V.
Author_Institution :
Inst. of Appl. Phys., Acad. of Sci., Nizhny Novgorod, Russia
fDate :
6/1/2002 12:00:00 AM
Abstract :
In an X-band Cerenkov amplifier driven by a 0.8-MeV 6-kA electron beam, a gigawatt-level of power radiated in a Gaussian pattern in a 70-ns pulse duration has been demonstrated. The coherence of the output radiation is provided by dividing the oversized interaction space into separate sections with different azimuthal symmetry that couples only with the electron beam. A large gain of 47 dB and an efficiency of 23% are obtained using a regenerative amplification of a backward-wave amplifier (BWA) that produce a modulation of the electron beam. The efficiency of this device is 27% when the BWA-modulator operates in the regime of auto oscillations.
Keywords :
Cherenkov radiation; backward wave oscillators; backward wave tubes; microwave power amplifiers; microwave tubes; 0.8 MeV; 23 percent; 27 percent; 47 dB; 6 kA; 70 ns; Gaussian pattern; Gaussian wave beam; X-Band gigawatt amplifier; X-band Cerenkov amplifier; azimuthal symmetry; backward-wave amplifier modulator; coherent radiation; electron beam; electron beam modulation; high-power relativistic electron beam driven amplifier; interaction space; output radiation coherence; pulse duration; radiated power; regenerative amplification; separate sections; Coherence; Electron beams; Gain; High power amplifiers; Microwave amplifiers; Noise reduction; Optical coupling; Physics; Power amplifiers; Pulse amplifiers;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2002.801601
