Speaker
Description
As laser wakefield acceleration (LWFA) progresses, the prospect of table-top free-electron lasers (FELs) in the extreme ultraviolet becomes increasingly feasible. Despite successful demonstrations of coherent FEL sources driven by LWFA, achieving stable high-gain FEL output remains a significant challenge due to insufficient electron stability. In this study, we have designed a beams transport system using active plasma lenses (APLs) for LWFA-EUV-FEL. Through Start-To-End simulations, we achieved a radiation energy of 7.2 $\mu$J and a peak power of 3.2 GW at 13.5 nm. Moreover, the output remained above 1 $\mu$J even with a bunch energy jitter of -7% to +9%, greatly enhancing the chromaticity robustness of future compact FEL source. We further investigated the forces experienced by electrons within APLs and the emittance evolution, and provided the radiation gain process of APL-beamline FELs. This APL-beamline scheme is expected to greatly enhance the reliability of LWFA-driven FELs, and will enable prospects for widespread applications.