Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 3: Correlation dynamics in plasmas and clusters I

A 3.1: Hauptvortrag

Montag, 12. März 2012, 10:30–11:00, V47.03

Many-electron dynamics triggered by strong FEL pulse — •Ulf Saalmann — Max-Planck-Institut für Physik komplexer Systeme · Dresden

Intense pulses at extreme-ultraviolet or Xray wavelengths — as available from short-wavelength free-electron laser sources like FLASH in Hamburg/Germany, SACLA at Spring8/Japan or LCLS in Stanford/California — couple a large numbers of photons into clusters or bio-molecules, or more generally, extended systems. Within femtoseconds many electrons are released through single-photon absorption. The induced many-electron dynamics depends critically on the photon frequency and the pulse duration. We discuss the various regimes, ranging from nano-plasma termalization [1] to massively parallel ionization [2]. The dynamics can be studied experimentally by measuring electron spectra. We present spectra as obtained by means of a generic model, called Coulomb complexes [3], and from simple analytical considerations.

[1] U Saalmann, I Georgescu, J-M Rost, New J. Phys. 10, 025014 (2008).

[2] Ch Gnodtke, U Saalmann, J-M Rost, arxiv.org/abs/1111.6888

[3] Ch Gnodtke, U Saalmann, J-M Rost, New J. Phys. 13 013028 (2011).