High repetition rate seeded free electron laser with an optical klystron in high-gain harmonic generation

Many high-gain free electron lasers worldwide are planning to incorporate seeding setups into their day-to-day operation. These techniques provide both longitudinal and transverse coherence extended control of the output laser radiation spectral properties. However, wavelength repetition rate strongly depend on properties seed system. With peak power required for successful seeded operation, it is currently not possible increase an extent that matches bunch superconducting accelerators. Here, we investigate advantages a modification standard setups, by combining with so-called optical klystron. this new setup, decrease requirements therefore, systems can at same wavelength. We show simulation results in harmonic generation (HGHG) setup range harmonics (8th 15th) verify reduction Optical Klystron HGHG scheme. Finally, comment stability proposed jitter sources shot-to-shot fluctuations compare