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Showing 1–16 of 16 results
Advanced filters: Author: Alberto A. Lutman Clear advanced filters

  • A new scheme for multicolour X-ray free-electron lasers at soft X-ray wavelengths is proposed. The scheme significantly improves two-colour pulse generation and makes possible the first demonstration of three-colour pulse generation.

    • Alberto A. Lutman
    • Timothy J. Maxwell
    • Johann C. U. Zemella
    Research
    Nature Photonics
    Volume: 10, P: 745-750

  • Tunable polarization control and a two-colour X-ray pump–X-ray probe operating mode are demonstrated at the Linac Coherent Light Source (LCLS).

    • Alberto A. Lutman
    • James P. MacArthur
    • Heinz-Dieter Nuhn
    Research
    Nature Photonics
    Volume: 10, P: 468-472

  • Strong lasing effects similar to those in the optical regime can occur at 1.5–2.1 Å wavelengths during high-intensity XFEL-driven Kα1 lasing of copper and manganese.

    • Thomas M. Linker
    • Aliaksei Halavanau
    • Uwe Bergmann
    Research
    Nature
    Volume: 642, P: 934-940

  • Diffraction-before-destruction of ultrashort X-ray pulses can visualize non-equilibrium processes at the nanoscale with sub-femtosecond precision. Here, the authors demonstrate how the brightness and the spatial resolution of such snapshots can be substantially increased despite ionization.

    • Stephan Kuschel
    • Phay J. Ho
    • Tais Gorkhover
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8

  • Methods to characterize the free-electron laser pulses are evolving and their performances are also improving. Here the authors demonstrate a method based on the artificial neural networks to predict the output pulses of the X-ray free-electron laser by considering the electron beam parameters as input.

    • Kenan Li
    • Guanqun Zhou
    • Anne Sakdinawat
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-9

  • The local X-ray-induced dynamics that occur in protein crystals during serial femtosecond crystallography (SFX) measurements at XFELs are not well understood. Here the authors performed a time-resolved X-ray pump X-ray probe SFX experiment, and they observe distinct structural changes in the disulfide bridges and peptide backbone of proteins; complementing theoretical approaches allow them to further characterize the details of the X-ray induced ionization and local structural dynamics.

    • Karol Nass
    • Alexander Gorel
    • Ilme Schlichting
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-9

  • Pump-probe spectroscopy is routinely used to interrogate ultrafast valence electronic and vibrational dynamics in complex systems. Here, the authors extend this technique to the X-ray regime using a sequence of femtosecond X-ray pulses to understand core-valence interactions in a solvated molecular complex.

    • Robert B. Weakly
    • Chelsea E. Liekhus-Schmaltz
    • Munira Khalil
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8

  • X-ray fee-electron lasers (XFELs) enable time-resolved crystallography experiments and the structure determination of proteins with little or no radiation damage. However currently it is unknown whether the designated 4.5 MHz maximum pulse rate for the European XFEL could lead to sample damage caused by shock waves from preceding pulses. Here, the authors address this question by performing a X-ray pump X-ray probe experiment on haemoglobin microcrystals at the Stanford XFEL facility that mimics the 4.5 MHz data collection mode and observe structural changes and a drop in diffraction data quality of the crystals.

    • Marie Luise Grünbein
    • Alexander Gorel
    • Ilme Schlichting
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-11

  • X-ray photoelectron spectroscopy probes the chemical environment in a molecule at a specific atomic site. Here the authors extend this concept with a site selective trigger to follow chemical bond changes as they occur on the femtosecond time scale.

    • Andre Al-Haddad
    • Solène Oberli
    • Christoph Bostedt
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Generation of intense attosecond waveforms with independently controllable amplitude and phase is performed by using a seeded free-electron laser.

    • Praveen Kumar Maroju
    • Cesare Grazioli
    • Giuseppe Sansone
    Research
    Nature
    Volume: 578, P: 386-391

  • X-ray free electron lasers allow for studying the interaction of magnetic materials with intense X-rays beyond a linear response regime. Here, the authors demonstrate the onset of X-ray induced ultrafast demagnetization in Co/Pd multilayers via a redistribution of valence electrons on timescales shorter than 40 fs.

    • Daniel J. Higley
    • Alex H. Reid
    • Joachim Stöhr
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-9

  • Ultrashort circularly polarised light pulses from free-electron lasers offer a route for exploring chiral molecules and their dynamics, but remain challenging to harness. Here, X-ray pump-probe experiments enable a site-specific photoelectron circular dichroism measurement on a dissociating chiral molecule.

    • Markus Ilchen
    • Philipp Schmidt
    • Philipp V. Demekhin
    ResearchOpen Access
    Communications Chemistry
    Volume: 4, P: 1-9