Nonlinear simulation of free electron laser in a rectangular waveguide and ion-channel guiding

Abstract

In this study, the free electron laser (FEL) with a planar wiggler and an ion-channel in a rectangular waveguide is studied for TE waves with numerical simulation. The output power of FEL is obtained self-consistently from the equation of motion and Maxwell's equations. Numerical analysis shows that using the ion-channel, in spite of the magnetic field case [Sakamoto et al., J. Appl. Phys. 75, 36 (1994)], can improve output power in addition to guiding the electrons into the center and prevent dissipation of the beam.

Nonlinear simulation of TM mode free electron laser in rectangular waveguide with ion-channel

“…Also, it is seen that the period of the fluctuations is equal to half the wiggler wavelength as mentioned [28]. In spite of the general similarity in the behavior of the radiated power with that of figure 2 in [26], the fluctuations are relatively larger here.…”

“…The resultant plots in figure 1 are nearly the same as figure 2 in [24]. Additionally we have benchmarked the correctness of the written code by employing the conditions considered in [25], which was explained extensively in our earlier publication [26].…”