Development of advanced FEL techniques at the European XFEL

Gianluca A. Geloni

doi:10.1117/12.2593118

18 April 2021 Development of advanced FEL techniques at the European XFEL

Gianluca A. Geloni

Proceedings Volume 11776, EUV and X-ray Optics, Sources, and Instrumentation; 117760N (2021) https://doi.org/10.1117/12.2593118
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

During the last year, a variety of advanced FEL techniques were investigated at the European XFEL by the Operation and FEL R&D teams, which led to several scientific achievements. The Hard X-ray Self-Seeding (HXRSS) system installed at the SASE2 line produced seeded beams with more than 700uJ within 0.7 eV FWHM bandwidth at 9keV. High-repetition rate capabilities were enabled with the production of up to 4000 seeded pulses per second, and seeded (as well as unseeded) FEL spectra were monitored in single-shot-resolved manner with MHz-rep-rate. Almost no effects due to crystal heat loading was detected on pulse intensities and spectral properties along the pulse train. Two-color pulses were generated and delivered in the Soft X-Ray range, by means of a newly installed 2-Color Pump-Probe (2CPP) setup. Electron bunching manipulations beyond the SASE mode, like e.g. frequency mixing, began to be experimentally investigated. In this talk we will review the current status of these techniques at the European XFEL, with particular emphasis on the Hard X-ray Self Seeding system.

Conference Presentation

Citation Download Citation

Gianluca A. Geloni "Development of advanced FEL techniques at the European XFEL", Proc. SPIE 11776, EUV and X-ray Optics, Sources, and Instrumentation, 117760N (18 April 2021); https://doi.org/10.1117/12.2593118

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