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    Science@FELS

    21–25 Sept 2026
    Paul Scherrer Institut
    Europe/Zurich timezone

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    Session

    Forum on Advanced FEL Techniques

    24 Sept 2026, 14:00
    Auditorium (WHGA/001) (Paul Scherrer Institut)

    Auditorium (WHGA/001)

    Paul Scherrer Institut

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    1. 131. Introduction
      Marc Guetg
      24/09/2026, 14:00
    2. 110. Overview Talk coherence
      Markus Gühr (FLASH)
      24/09/2026, 14:10
    3. 111. HXRSS
      Daria Gorelova
      24/09/2026, 14:30
      Invited
    4. 112. Evoluon of FLASH1 ino a Fully Seeded, MHz-Capable FEL Faciliy
      Eugenio Ferrari (Deutsches Elektronen-Synchrotron DESY)
      24/09/2026, 14:50
    5. 129. Extension of FERMI FEL operation across the water window and beyond
      Peter Susnjar (ELLETRA)
      24/09/2026, 15:10
      Invited

      The FERMI FEL, as an externally seeded facility, provides extraordinary temporal coherence, pulse-to-pulse stability, and spectral purity, overcoming the stochastic limitations inherent in self-amplified spontaneous emission (SASE). However, its maximum photon energy is primarily limited by the achievable harmonic multiplication before energy spread and microbunching degradation disrupt the...

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    6. 114. DISCUSSION
      24/09/2026, 15:30
    7. 115. Tunable, phase-locked hard X-ray pulse sequences
      Philipp Dijkstal (PSI - Paul Scherrer Institut)
      24/09/2026, 16:45
    8. 116. Twin-Pulse user alk
      Cornelius Strom (DESY)
      24/09/2026, 17:05
    9. 45. Short and Multicolor FEL Pulse Generation at ARIA@SPARC_LAB
      Giacomo Griseri (INFN-LNF)
      24/09/2026, 17:25
      Invited

      ARIA will be the second free-electron laser beamline of the plasma-based accelerator facility EUPRAXIA@SPARC_LAB, hosted at Laboratori Nazionali di Frascati. Designed as a seeded FEL operating in the ultraviolet spectral range, ARIA will complement FERMI, providing radiation in the range 50-180nm.

      Leveraging the capability of EUPRAXIA@SPARC_LAB to generate ultrashort electron...

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    10. 108. Coheren sub-femosecond X-ray radiaon: single-spike pulses and mode-locked frequency combs
      Eduard Prat Costa (PSI - Paul Scherrer Institut)
      24/09/2026, 17:45
      Invited
    11. 118. DISCUSSION
      24/09/2026, 18:10
    12. 119. Overview short pulses
      Tais Gorkhover, Tais Gorkhover (Universität Hamburg)
      25/09/2026, 08:30
    13. 122. XLEAP/LCLS/EuXFEL
      Agostino Marinelli (SLAC National Laboratory)
      25/09/2026, 08:50
      Invited
    14. 125. Generation of Ultra-short FEL Pulses via Laser-driven Local Bunch Compression
      Philipp Amstutz (DESY)
      25/09/2026, 09:10
      Invited
    15. 124. DISCUSSION
      25/09/2026, 09:40
    16. 126. Hard X-ray Free Electron Laser pulse multiplexing and steering capabilities at the European XFEL
      Mikako Makita (European XFEL GmbH)
      25/09/2026, 11:25
    17. 120. Attosecond update
      River Robbles (SLAC)
      25/09/2026, 11:50
    18. 127. Beating slippage in externally seeded FELs for fs pulses
      P. Rebernik
      25/09/2026, 12:10
    19. 132. closeout
      Giovanni Perosa
      25/09/2026, 12:30
    20. 121. ASPECT & FLARE
      Filippo Sottocorona (DESY)
    21. 113. FERMI a O-N Edges and breaking he barrier of 1 keV
      Giovanni Campri (Elettra-Sinctrotrone Trieste S.C.p.A.)
    22. 123. Photo chemistry with molecules
      Tim van Driel (SLAC National Accelerator Laboratory)
    23. 50. Reminisce - Refurbishment of Mirrors to Increase Sustainability at Light Sources - A European collaboration project
      Silja Schmidtchen (European XFEL)
      1
      Forum on advanced FEL techniques
      Poster

      The degradation and Carbon contamination of X-ray optics is a well-known problem in X-ray beamlines with harmful effects on beamline performance. This is particularly problematic, as such optics are usually highly specialized and coated with various materials. Consequences of such contamination include the distortion of the wavefront, reduction in focusing power and resolution, and loss of...

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