Speaker
Description
Experimental investigations of terahertz (THz) free electron lasers (FELs) at the Photo Injector Test Facility at DESY in Zeuthen (PITZ) have demonstrated the feasibility and substantial potential of high-power tunable THz sources driven by a PITZ-like accelerator. Preliminary seeding experiments indicate improvements in the lasing process, such as earlier saturation and reduced fluctuations in the pulse energy of THz radiation. The concept of a THz FEL based on a PITZ-like accelerator has been proposed as a tunable high-power THz source for pump-probe experiments at the European XFEL, which includes the possibility of seeding with a dielectric-lined waveguide (DLW). This paper presents start-to-end simulations of the DLW seeding option, demonstrating that high bunching factors can be achieved at both the fundamental frequency and higher harmonics, with a discussion of the THz FEL lasing process.
