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Nanosecond Hybrid Modulator for the Fast-Repetitive Driving of X-Band, Gigawatt-Power Microwave Source

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10 Author(s)
Luybutin, S.K. ; Ural Div., Russian Acad. of Sci., Ekaterinburg, Russia ; Rukin, S.N. ; Sharypov, K.A. ; Shpak, V.G.
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Results of tests of a fast-repetitive nanosecond modulator with a peak output power of 3 GW are presented. It comprises of a type S-5N charging driver, a power compressor based on a pulsed forming line, and a gas spark gap. The modulator has been designed for the formation of high-current electron beams and high-power microwave generation in a pulsed-repetitive regime. Excitation of 10-GHz microwave pulses \sim1 ns long in a relativistic backward-wave oscillator with an elongated periodic slow-wave system has been studied. Optimization of the regime of interaction between electromagnetic fields and particles provided an average power of microwave radiation in the burst-repetitive mode (1 s; \sim700 Hz) of up to 2.5 kW at a focusing magnetic field ( \sim0.6 T) below the cyclotron resonance region. The peak output power of the oscillator exceeded 2 GW.

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Plasma Science, IEEE Transactions on  (Volume:33 ,  Issue: 4 )