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Showing 1–6 of 6 results
Advanced filters: Author: F.-J. Decker Clear advanced filters

  • Lasing in a hard-X-ray free-electron laser is typically seeded from noise due to the self-amplification of spontaneous emission, which limits temporal coherence and spectral characteristics. Researchers now demonstrate self-seeding using X-rays from the first half of the magnetic undulator to seed the second half via a diamond-based monochromator at ångström wavelengths.

    • J. Amann
    • W. Berg
    • D. Zhu
    Research
    Nature Photonics
    Volume: 6, P: 693-698

  • Characterizing femtosecond X-ray pulses that vary from shot to shot is important for data interpretation. Here, Behrens et al.measure time-resolved lasing effects on the electron beam and extract the temporal profile of X-ray pulses using an X-band radiofrequency transverse deflector.

    • C. Behrens
    • F.-J. Decker
    • J. Wu
    Research
    Nature Communications
    Volume: 5, P: 1-7

  • Two-colour X-ray pulses from free-electron lasers can be used to probe ultrafast dynamics, but the total power is a fraction of the saturation power. Here, Marinelli et al. use twin electron bunches to reach full saturation power and increase the two-colour intensity by an order of magnitude at hard-X-ray energies.

    • A. Marinelli
    • D. Ratner
    • Z. Huang
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-6

  • Axions are hypothetical light particles that could explain the dark matter. They could be produced in the interior of the Sun and the CERN Axion Solar Telescope sets the best limit on how strongly axions can interact with light.

    • V. Anastassopoulos
    • S. Aune
    • K. Zioutas
    ResearchOpen Access
    Nature Physics
    Volume: 13, P: 584-590

  • The Linac Coherent Light Source free-electron laser has now achieved coherent X-ray generation down to a wavelength of 1.2 Å and at a brightness that is nearly ten orders of magnitude higher than conventional synchrotrons. Researchers detail the first operation and beam characteristics of the system, which give hope for imaging at atomic spatial and temporal scales.

    • P. Emma
    • R. Akre
    • J. Galayda
    Research
    Nature Photonics
    Volume: 4, P: 641-647