XFEL 2attosecond pulses 1electron beam trajectory 1hard x-ray 1nanofocusing 1nonlinear light-matter interaction 1SASE operation 1self-seeding 1two-color operation 1undulator alignment 1
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physics.acc-ph2026
Beam based undulator trajectory alignment at European XFEL
Winfried Decking, Frank Brinker, Lars Froehlich +2
The paper describes a combined electron‑ and photon‑beam method with step‑by‑step performance optimization to align the 250 m long undulator trajectory at the European XFEL onto a…
physics.acc-ph2026
Beam-Driven Transverse Deflecting Structure for Femtosecond Electron-Beam Diagnostics
S. Tomin, D. Bazyl, W. Decking +1
High-resolution longitudinal phase-space (LPS) diagnostics are essential for X-ray free-electron lasers and advanced accelerators. Conventional radio-frequency transverse deflectin…
physics.acc-ph2026
High-power attosecond X-ray free-electron lasers: physics and design strategy
Chenzhi Xu, Jiawei Yan, Ye Chen +5
Attosecond pulses from X-ray free-electron laser (XFEL) have opened new opportunities for probing ultrafast electronic dynamics on the Angstrom--attosecond spatiotemporal scale. Mo…