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High-power Čerenkov microwave oscillators utilizing High-Current nanosecond Electron beams

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Abstract

A short review is given of results obtained at the Institute of High-Current Electronics of the Siberian Branch of the Russian Academy of Sciences on generating high-power microwave radiation. Most of the research was devoted to a study of stimulated Čerenkov radiation from relativistic electron beams. It is shown that the efficiency of a relativistic 3-cm backward wave tube with a nonuniform coupling resistance can reach 35%. High-frequency radiation was discovered in the emission spectrum of the Čerenkov oscillators and it was shown that the nature of the radiation was associated with the stimulated scattering of low-frequency radiation by the relativistic electrons. Radiation with a power of 500 MW was obtained in the 8-mm wavelength range using a two-beam Čerenkov oscillator. High-current pulse-periodic nanosecond accelerators with a charging device utilizing a Tesla transformer were used in the experiments. The possibility was demonstrated of generating high-power microwave radiation with a pulse-repetition frequency of up to 100 Hz. An average power of ∼500 W was achieved from the relativistic oscillators. A relativistic backward wave tube with a high-current electron beam was used to make a prototype nanosecond radar device. Some of the results presented were obtained jointly with the Russian Academy of Sciences Institute of Applied Physics. Questions concerning multiwave Čerenkov interaction are not considered in this paper.

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Authors
  1. S. D. Korovin
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  2. S. D. Polevin
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  3. V. V. Rostov
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Additional information

Institute of High-Current Electronics, Siberian Branch of the Russian Academy of Sciences, Tomsk. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 5–20, December, 1996.

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Korovin, S.D., Polevin, S.D. & Rostov, V.V. High-power Čerenkov microwave oscillators utilizing High-Current nanosecond Electron beams. Russ Phys J 39, 1163–1176 (1996). https://doi.org/10.1007/BF02436159

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