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BibTeX file of [Son11b] [show it without abstract]

@conference{Son11b,
    author={Sang-Kil Son and Linda Young and Robin Santra},
    title={Impact of hollow-atom formation on coherent x-ray scattering at high intensity},
    year={2011},
    month={January 26-28},
    booktitle={European XFEL and HASYLAB Users' Meeting},
    institution={DESY},
    address={Hamburg, Germany},
    keywords={hollow-atom; damage; ionization; Auger; fluorescence; x-ray scattering; x-ray diffraction; molecular imaging; FEL; C; CFEL; DESY;},
    note={poster},
    url={https://indico.desy.de/conferenceDisplay.py?confId=3573},
    abstract={X-ray free-electron lasers (FELs) are promising tools for structural determination of macromolecules via coherent x-ray scattering. During ultrashort and ultraintense x-ray pulses with an atomic scale wavelength, samples are subject to radiation damage and possibly become highly ionized, which may influence the quality of x-ray scattering patterns. We develop a toolkit to treat detailed ionization, relaxation, and scattering dynamics for an atom within a consistent theoretical framework. The coherent x-ray scattering problem including radiation damage is investigated as a function of x-ray FEL parameters such as pulse length, fluence, and photon energy. We find that the x-ray scattering intensity saturates at a fluence of ~10$^7$ photons/\AA$^2$ per pulse, but can be maximized by using a pulse duration much shorter than the time scales involved in the relaxation of the inner-shell vacancy states created. Under these conditions, both inner-shell electrons in a carbon atom are removed, and the resulting hollow atom gives rise to a scattering pattern with little loss of quality for a spatial resolution > 1 \AA. Our numerical results predict that in order to scatter from a carbon atom 0.1 photons per x-ray pulse, within a spatial resolution of 1.7 \AA, a fluence of 1$\times$10$^7$ photons/\AA$^2$ per pulse is required at a pulse length of 1 fs and a photon energy of 12 keV. By using a pulse length of a few hundred attoseconds, one can suppress even secondary ionization processes in extended systems. The present results suggest that high-brightness attosecond x-ray FELs would be ideal for single-shot imaging of individual macromolecules.} }

Sang-Kil Son, Linda Young, and Robin Santra, Impact of hollow-atom formation on coherent x-ray scattering at high intensity in European XFEL and HASYLAB Users' Meeting (DESY, Hamburg, Germany, January 26-28, 2011) [poster] [poster][poster: 2Mb][abstract][abstract][link][link]


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