Simulation of pre-bunched free electron laser oscillator in the THz regime

• Main Authors: F Bazouband, E Mir
• Format: Article
• Language: English
• Published: Isfahan University of Technology 2020-08-01
• Series: Iranian Journal of Physics Research
• Subjects: free electron laser oscillator; one dimensional simulation; planar wiggler; energy and pre-bunching of beam
• Online Access: http://ijpr.iut.ac.ir/article_1607_f0869105e30dc2282b9c01271425dde5.pdf

One of the long-term objectives in the development of high gain free electron lasers (FEL) is to reduce the necessary electron beam voltage for a strong FEL interaction at a given frequency. FEL oscillators (FELOs) play the main role to this end. In this paper, the simulation of one dimensional FELO with planar wiggler is done at the applicable Tera-hertz regime. The effect of pre-bunched electron beam on the gain improvement or on the laser length is investigated. To study the evolution of system, a set of self-consistent nonlinear differential equations are solved numerically by the Runge-Kutta method and the averaging of electron beam is done by the Simpson method.