  The interaction of short laser pulses with small rare gas clusters is
investigated by using a microscopic, semi-classical model with an explicit
treatment of the inner-atomic dynamics. Field and collisional ionisation as
well as recombination are incorporated self-consistently so that the use of
rates for these processes could be avoided. The laser absorption and ionisation
mechanisms in clusters at near-infrared (800nm) and VUV wavelength (100nm) are
analysed.
