Speaker
Description
Seeded free-electron lasers (FELs) are advanced, accelerator-based light sources characterized by high coherence and stability. In our previous research, we proposed an intelligent optimization framework for studying the micro-bunching process in seeded FELs. Using this framework for exploratory optimization, we identified a novel seeded FEL scheme. This scheme employs an optical layout identical to echo-enabled harmonic generation (EEHG), but by adjusting the parameters of the seed lasers and chicanes, it achieves bunching factors exceeding the theoretical limit of conventional EEHG. In this paper, using a representative set of realistic beam parameters, we demonstrate how this novel scheme induces a high harmonic density modulation in the electron beam. Then, we theoretically analyze this novel seeded FEL, presenting its underlying principles.
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