Effect of beam energy spread on cascade optical klystron undulator radiation

Terahertz radiation source using a high-power industrial electron linear accelerator

“…In the case of lasing in an FEL, the gain profile of stimulated emitted radiation is very sensitive to electron energy and therefore, one requires a high quality electron beam with low energy spread to maintain the resonance condition of the system [30,31]. In the case of spontaneous emission of radiation from the undulator, if the energy spread of the electron beam is large, the intensity spectrum will be broad; keeping the total output power nearly the same [32]. The relative frequency width δω/ω due to the energy spread is 2δγ/γ, where γ is the energy of the electron beam in unit of its rest mass energy.…”

Four - frequency undulator radiation intensity in free electron laser

“…The two frequency and three frequency schemes studied in the past by the researchers. In this paper, we have studied [4][5][6][7][8][9] four frequency undulator scheme with the effect of angular injection and radiation intensity expression [10][11] has been expressed. The trajectory of electron is formulated using Lorentz force.…”

Spontaneous emission and spectral properties of radiation by relativistic electrons in a gyro-klystron and optical-klystron undulator

“…The dispersive section is either a three-or foursection chicane where the electrons experience modulation without resonant interaction. Without resonant interaction in the dispersive section, the small changes in the electron velocity lead to phase modulation and this leads to enhanced emission of radiation in the second section of the undulator, called the radiator (Dattoli & Bucci, 2000a,b;Dattoli et al, 1993;Gehlot & Mishra, 2010;Elleaume, 1986;Kong, 1996). There have been several studies on the optical klystron undulator that explain the modelling of the dispersive section (Boscolo & Colson, 1985;Colson & Fredman, 1983;Gallardo & Pellegrini, 1990a,b;Thomas et al, 2002;Elleaume, 1983;Vinokurov & Skrinsky, 1977;Vinokurov, 1977;Artamonov et al, 1980).…”