Generation of giant pulses of scattered radiation on the moving front of a pump wave

To generate high-power short-wavelength pulses during the process of the stimulated scattering of a high-power pump wave on a relativistic electron beam, the use of the displacement of a pump spot along the electron flow with the group velocity of the scattered beam has been proposed. Under such conditions, the scattered radiation will be a monopulse with the amplitude increasing proportionally to the displacement of the pump spot due to the energy transfer from unmodulated electron fractions. In the case of an optical laser pump, depending on the direction of the wave vector of the pump field relative to the translational motion of electrons, the new mechanism can be used to generate high-power pulses in terahertz (Doppler down conversion) or ultraviolet (up conversion) bands.