Modified nanoplasma model for laser-cluster interaction

We present a modified nanoplasma model to describe the interaction of intense laser pulses with rare-gas clusters of nanometric size. Compared to previous models, the model relies on a better description of the collisional processes and allows one to obtain highly charged ion populations and associated x-ray spectra in accordance with experimental findings. We further study the x-ray emission dependence on pulse duration and cluster size and show that these parameters can be optimized to maximize He a production.