Jan Michael Rost
Max Planck Institute for
the Physics of Complex Systems
Noethnitzer Str 38, 01187
Dresden
The talk
will focus on the description of the fragmentation of rare gas atom
clusters under an intense laser pulse of variable length. We will also
review briefly the behavior of atoms and small molecules in strong laser
pulses to identify the fragmentation mechanism in the cluster and
to compare its efficiency with that in atoms.
While the first part of
this presentation will be restricted to the Ti-Sapphire wavelength
of 800 nm, we will discuss in the second part future
pulses which will become
available at Xray free
electron lasers (XFEL's). Taking the design planned at DESY in
Hamburg, we deal with a 300 fs light pulse containing
photons of keV energy, capable to ionize inner shell electrons of the atomic
cluster constituents. This leads to very different fragmentation
dynamics compared to the near-infrared photon
frequency as will be
explained.