Powerful Long-Pulse FEL based on Linac LIU: Simulations and Optimization of Parameters for Initial Experiments at 0.3 THz Range

Project of sub-THz/THz band FEL driven by induction linac LIU is under development in collaboration between BINP RAS (Novosibirsk) and IAP RAS (N.Novgorod) and aimed to achieve sub-GW power and a record pulse energy content of ~ 10 -100 J in these frequency band. Two alternative electrodynamic systems were proposed for this FEL to provide stable narrow-band generation regime: (1) advanced Bragg resonators with quasi-cutoff feedback waves and (2) quasi-optical resonators of the Talbot-type. Present paper is devoted to the results of simulations and optimization of parameters of the FEL with such resonators for conducting initial experiments at the 0.3 THz range.