Amplification of monochromatic short-wavelength radiation during the stochastic deceleration of a relativistic electron stream in an incoherent pump field |
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Authors: | Ya L Bogomolov N S Ginzburg E R Golubyatnikova |
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Institution: | (1) Institute of Applied Physics, Russian Academy of Sciences, 603600 Nizhnii Novgorod, Russia |
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Abstract: | The use of incoherent multiwave pump radiation or randomly varying magnetostatic fields (stochastic undulators) for improving
the energy conversion efficiency in free-electron lasers based on stimulated wave scattering and the stimulated undulator
emission of relativistic electron beams is proposed. It is shown within the quasilinear approximation that the electronic
efficiency increases in proportion to the width of the pump spectrum due to enrichment of the spectrum of combination waves
which are synchronous with the electron beam and realization of a mechanism of stochastic particle deceleration when the signal
wave is monochromatic. At the same time, the efficiency scarcely depends on the spread of the beam parameters, making the
use of the method promising for improving the efficiency of free-electron lasers powered by intense relativistic electron
beams.
Zh. Tekh. Fiz. 67, 77–81 (July 1997) |
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