Cyclotron superradiance of a high-current electron bunch under group synchronism conditions |
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| Authors: | V G Shpak S A Shunailov M R Ul'maskulov M I Yalandin N S Ginzburg I V Zotova A S Sergeev I V Konoplev A D R Phelps A W Cross S J Cooke P Aitken |
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| Institution: | (1) Institute of Electrophysics, Urals Branch, Russian Academy of Sciences, Ekaterinburg;(2) Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod;(3) University of Strathclyde, Glasgow, UK |
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| Abstract: | We have theoretically and experimentally investigated the process of induced coherent emission (superradiance) in an electron
bunch rotating in a homogeneous magnetic field. We have shown that this process makes it possible to generate ultrashort microwave
pulses. In this case, the optimum conditions are found under group synchronism conditions, when the translational velocity
of the bunch matches the group velocity of the radiation propagating in the waveguide circuit. For experimental investigation
of the superradiance, we used a RADAN accelerator with subnanosecond electron pulse sharpener. In the 35 GHz range, we obtained
microwave pulses with record short duration, down to 0.4 nsec for a peak power level up to 200 kW.
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 89–97, December, 1996. |
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