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  1. No Access

    Article

    Clocking Auger electrons

    Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. The relaxation occurs primarily via Auger emission, so excit...

    D. C. Haynes, M. Wurzer, A. Schletter, A. Al-Haddad, C. Blaga, C. Bostedt… in Nature Physics (2021)

  2. Article

    Open Access

    Hetero-site-specific X-ray pump-probe spectroscopy for femtosecond intramolecular dynamics

    New capabilities at X-ray free-electron laser facilities allow the generation of two-colour femtosecond X-ray pulses, opening the possibility of performing ultrafast studies of X-ray-induced phenomena. Particu...

    A. Picón, C. S. Lehmann, C. Bostedt, A. Rudenko, A. Marinelli… in Nature Communications (2016)

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    Article

    Measuring the temporal structure of few-femtosecond free-electron laser X-ray pulses directly in the time domain

    Short-wavelength free-electron lasers are now well established as essential and unrivalled sources of ultrabright coherent X-ray radiation. One of the key characteristics of these intense X-ray pulses is their...

    W. Helml, A. R. Maier, W. Schweinberger, I. Grguraš, P. Radcliffe… in Nature Photonics (2014)

  4. No Access

    Article

    Femtosecond electronic response of atoms to ultra-intense X-rays

    An era of exploring the interactions of high-intensity, hard X-rays with matter has begun with the start-up of a hard-X-ray free-electron laser, the Linac Coherent Light Source (LCLS). Understanding how electr...

    L. Young, E. P. Kanter, B. Krässig, Y. Li, A. M. March, S. T. Pratt, R. Santra… in Nature (2010)

  5. Article

    Scaling strong-field interactions towards the classical limit

    A systematic experimental study of the ionization of argon by mid-infrared light confirms half-a-century-old predictions and paves the way to the development of brighter, shorter attosecond pulse sources.

    P. Colosimo, G. Doumy, C. I. Blaga, J. Wheeler, C. Hauri, F. Catoire… in Nature Physics (2008)

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  6. No Access

    Article

    High order harmonic generation by non-linear reflection of a pedestal-free intense laser pulse on a plasma

    We demonstrate the influence of the prepulses and ASE of ultrashort pulses interacting with a solid target by addressing the direct comparison of the harmonic spectra generated by reflection onto a solid targe...

    G. Doumy, S. Dobosz, P. D’Oliveira, P. Monot, M. Perdrix, F. Quéré… in Applied Physics B (2004)