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Düsseldorf 2007 – scientific programme

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SYCP: Symposium Strongly coupled plasmas

SYCP 1: Symposium Strongly Coupled Plasmas

SYCP 1.2: Invited Talk

Tuesday, March 20, 2007, 14:30–15:00, 5D

Collisional absorption of intense laser fields in dense plasmas — •Manfred Schlanges1, Thomas Bornath2, and Paul Hilse11Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, 17487 Greifswald — 2Institut für Physik, Universität Rostock, 18051 Rostock

In the last years, laser-matter interaction has become a field of increasing interest. This is due to the impressive progress in laser technology which makes it possible to create dense non-equillibrium plasmas by high intensity femtosecond laser pulses. Of special importance for modelling intense laser-matter interaction is to understand the transfer processes of energy from the laser field to matter. If solid targets or clusters are irradiated by intense laser pulses, dense two-temperature plasmas are created. Important mechanisms of energy deposition are ionization processes as well as collisional absorption. In a first part of this contribution, collisional absorption of dense plasmas in strong laser fields is investigated in the framework of quantum kinetic theory. An important quantity is the electron--ion collision frequency. For the latter, quantum statistical expressions are derived. Numerical results are presented for dense hydrogen and aluminium plasmas. Furthermore, we compare with molecular dynamics simulations. Finally, an application is given to describe finite systems like nanoplasmas in large argon and silver clusters interacting with intense laser pulses.

This work was performed under the auspices of the SFB 652 "Strong correlations and collective phenomena in radiation fields: Coulomb systems, clusters and particles".

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