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

M I Yalandin, S A Shunailov, V G Shpak, N S Ginzburg, I V Zotova, A S Sergeev, A D R Phelps, A W Cross, P Aitken

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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.

Original languageEnglish
Pages (from-to)948-950
Number of pages3
JournalTechnical Physics Letters
Issue number12
Publication statusPublished - Dec 1997


  • superradiance
  • cherenkov maser
  • free electron laser
  • electron beam
  • electron bunches

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