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Cerenkov superradiance from a subnanosecond electron bunch in a sectional decelerating system

Yalandin, M I and Shunailov, S A and Shpak, V G and Ginzburg, N S and Zotova, I V and Sergeev, A S and Phelps, A D R and Cross, A W and Aitken, P (1997) Cerenkov superradiance from a subnanosecond electron bunch in a sectional decelerating system. Technical Physics Letters, 23 (12). pp. 948-950. ISSN 1063-7850

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Abstract

Induced coherent radiation (superradiance) from a subnanosecond electron bunch in a combined decelerating system has been investigated experimentally. In a first section formed by a periodically modulated waveguide, the density of the bunch is modulated and it then radiates in a second section formed by a waveguide partially filled with a dielectric. At an electron energy of 250 keV and a peak current of 800 A, millimeter radiation pulses with powers up to 2 MW and lengths up to 800 ps were obtained.