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Highly Effective, Repetitive Nanosecond-Range Ka-band BWO

By: Rostov, V.V.; Shunailov, S.A.; Shpak, V.G.; Rukin, S.N.; Yalandin, M.I.; Mesyats, G.A.;

2008 / IEEE / 978-1-4244-1534-2

Description

This item was taken from the IEEE Conference ' Highly Effective, Repetitive Nanosecond-Range Ka-band BWO ' The quasi-stationary mode of operation of a high-efficiency 38-GHz nanosecond relativistic microwave backward-wave oscillator at a pulse repetition rate of 10 Hz has been demonstrated. A hybrid modulator based on an SM-3N SOS driver and on an energy compression unit containing a pulse-forming line and a spark gap was used to produce 5-ns electron-beam-accelerating pulses of the trapezoidal shape. Optimization of the energy exchange between the weakly magnetized electron flow and the oncoming harmonics of the TM01 wave inside the periodic slow-wave structure has made it possible to achieve a peak power of ~170 MW for 4-ns microwave pulses at an electron efficiency no less than 30-35%.