In:
Laser and Particle Beams, Hindawi Limited, Vol. 21, No. 2 ( 2003-04), p. 187-196
Abstract:
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%.
Type of Medium:
Online Resource
ISSN:
0263-0346
,
1469-803X
DOI:
10.1017/S0263034603212064
Language:
English
Publisher:
Hindawi Limited
Publication Date:
2003
detail.hit.zdb_id:
2021816-3
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