FEL2026 - 42nd International Free Electron Laser Conference

Session

Seeded FEL (Contributed)

TUB

25 Aug 2026, 11:20

Li Ka Shing Center

122. Coherent Undulator Radiation Seeding of High-Gain Harmonic Generation (TUB01)

Jenny Morgan (SLAC National Accelerator Laboratory)

25/08/2026, 11:20

Session 5: Seeded FEL

Contributed Oral Presentation

We propose and simulate a scheme for generating coherent short-wavelength radiation exploiting the intrinsic coherence of emission from a compressed, high-current electron beam. When the bunch length is shorter than the resonant wavelength, the undulator radiation is temporally coherent. This radiation is extracted and optically refocused onto a second, longer electron beam, acting as a...

148. HXRSS at the European XFEL: Progress from SASE2 to SASE1 (TUB02)

Matthias Scholz (Deutsches Elektronen-Synchrotron DESY)

25/08/2026, 11:36

Session 5: Seeded FEL

Contributed Oral Presentation

The first high-repetition-rate hard X-ray self-seeding system was installed on the SASE2 beamline of the European XFEL in 2019. It has since been used to deliver self-seeded radiation pulses in burst mode over the photon-energy range from 6 to 18 keV, reaching a maximum spectral density of approximately 2 mJ/eV at 7.5 keV. User operation started in 2021, and an increasing fraction of user time...

146. Recent Development of Hard X-ray Self-Seeding for LCLS-II-HE (TUB03)

Ye Hong (SLAC National Accelerator Laboratory)

25/08/2026, 11:52

Session 5: Seeded FEL

Contributed Oral Presentation

We summarize ongoing preparation for high-repetition-rate HXRSS operation at LCLS-II-HE. Project requirements are being reviewed to reflect updated accelerator and FEL parameters, as well as crystal, cooling, mounting, chamber, and stability considerations. We will discuss the current design studies and simulation work, planned experimental validation activities, and the anticipated timeline...