Hannover 2016 – scientific programme

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A: Fachverband Atomphysik

A 33: Interaction with strong or short laser pulses III

A 33.2: Talk

Thursday, March 3, 2016, 11:30–11:45, f303

Charge Migration in Diffractive XFEL imaging — •Abraham Camacho Garibay, Ulf Saalmann, and Jan-Michael Rost — MPI-PKS, Dresden

The possibility of using XFEL sources for diffractive imaging has been suggested long ago by Neutze et. al. with the scheme known as "diffraction before destruction". For this to become a reality, a proper understanding of the dynamics triggered from the pulse is fundamental. Recent results have suggested that both field ionization and charge transfer can have a huge impact over the time evolution of finite systems such as clusters, which can be exploited do reduce the radiation damage for the duration of the pulse. In the present work we study the dynamics of Lysozyme under XFEL pulses, a system that is multi-component, non-symmetric and non-homogeneous. We have observed that a systematic migration of electrons from hydrogen (abundant in biological environments) to heavier, more absorbing and diffractive elements, take place. This migration has a consequence the stabilization of the heavy ion backbone, which allows for the use of longer pulses and/or weaker intensities in single-particle diffraction experiments, and has interesting implications for the coulomb explosion of heavier ions.