FEL2026 - 42nd International Free Electron Laser Conference

Session

Seeded FEL (Invited)

TUY

25 Aug 2026, 10:30

41. Few-femtosecond extreme-ultraviolet pulses and pulse pairs with tunable topological properties (TUY01)

Primoz Rebernik Ribic (Elettra-Sincrotrone Trieste S.C.p.A.)

25/08/2026, 10:30

Session 5: Seeded FEL

Invited Oral Presentation

We will present the first results of an experiment performed at the FERMI FEL to generate few-femtosecond extreme-ultraviolet (XUV) pulses using a recently developed slippage-compensation scheme in externally seeded free-electron lasers. Building on this approach, we will also show the results of a theoretical study aimed at extending the scheme to generate multiple few-femtosecond XUV pulses,...

149. First Lasing and Stable Operation of a Direct-Amplification Enabled Harmonic Generation Free-Electron Laser (TUY02)

Zheng Qi (Shanghai Advanced Research Institute)

25/08/2026, 10:55

Session 5: Seeded FEL

Invited Oral Presentation

First lasing and stable operation of a direct-amplification enabled harmonic generation free-electron laser were achieved, with the harmonic number up to 12th from a single-stage modulation and 30th from two-stage modulations employing the beam-echo effect. This work demonstrates for the very first time that high harmonic FEL generation can be facilitate using only one single seed laser with...