23–28 Aug 2026
America/Los_Angeles timezone

HXRSS at the European XFEL: Progress from SASE2 to SASE1

TUB02
25 Aug 2026, 11:36
16m
Contributed Oral Presentation Session 5: Seeded FEL Seeded FEL (Contributed)

Speaker

Matthias Scholz (Deutsches Elektronen-Synchrotron DESY)

Description

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 has since been allocated to HXRSS mode, reaching about 50% in 2025. Building on this success, a self-seeding system has recently been installed on the SASE1 beamline. During the initial commissioning, self-seeded radiation at 9.3 keV was demonstrated within only a few hours, highlighting the maturity and transferability of the HXRSS concept. In this talk, we will discuss the current operational capabilities, remaining issues and limitations, lessons learned from SASE2 operation, and possible next steps for further development.

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Authors

Lu Cao (Deutsches Elektronen-Synchrotron DESY) Matthias Scholz (Deutsches Elektronen-Synchrotron DESY)

Presentation materials

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