Production of short microwave pulses with a peak power exceeding the driving electron beam power

Anton A. Eltchaninov, Sergei D. Korovin, Vladislav V. Rostov, Igor V. Pegel, Gennady A. Mesyats, Sergei N. Rukin, Valery G. Shpak, Michael I. Yalandin, Naum S. Ginzburg

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


This article presents results of theoretical and experimental studies on the production of ultrashort (a few RF cycles duration) microwave pulses of gigawatt peak powers based on superradiance from high-current electron beams. With the Cherenkov backward-wave-electron-beam interaction in a low-dispersion slow-wave structure, microwave pulses with a peak power greater than the peak power of the driving electron beam have been produced for the first time. In an experiment using the SINUS-150 compact high-current electron accelerator, with a 2.6-kA injected beam current and a 330-kV electron energy, microwave pulses of 1.2 GW peak power and ∼0.5 ns duration (FWHM) were generated in the X-band. Production of superradiance pulses in a repetitive regime (3500 Hz) in the Ka-band has been demonstrated using a compact hybrid SOS-modulator. The effect of spatial accumulation of microwave energy in extended slow-wave structures with substantially nonuniform coupling has been demonstrated. In an experiment using the SINUS-200 compact accelerator, X-band pulses of ∼3 GW peak power and 0.6-0.7 ns width (FWHM) were produced with a power conversion efficiency of 150-180% and an energy efficiency of ∼15%.

Original languageEnglish
Pages (from-to)187-196
Number of pages10
JournalLaser and Particle Beams
Issue number2
Publication statusPublished - 2003
Externally publishedYes


  • BWO
  • Compact accelerator
  • High-efficiency short-pulse HPM source
  • Repetitive HPM source
  • Superradiance

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces

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