Kiel 2004 – scientific programme
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P: Plasmaphysik
P 17: Postersitzung: Plasma-Wand-Wechselwirkung III, Grundlegende Probleme Theorie II, Schwerionen- Laserplasmen II, Dichte Plasmen II
P 17.32: Poster
Wednesday, March 10, 2004, 17:45–19:30, Foyer
Collisional Absorption in Strong Laser Fields: Quantum Kinetics and Simulation — •P. Hilse1, M. Schlanges1, Th. Bornath2, and D. Kremp2 — 1Institut für Physik, Ernst-Moritz-Arndt-Universität Greifswald, D-17487 Greifswald — 2FB Physik, Universität Rostock, D-18051 Rostock
Collisional absorption of dense fully ionized plasmas in strong laser fields is investigated using quantum statistical methods. For high-frequency fields, quantum statistical expressions for the electrical current density and the electron-ion collision frequency are presented. Strong correlations are taken into account and their influence on the absorption rate is discussed. The expressions are valid for arbitrary field strength assuming the nonrelativistic case. In addition, we have performed molecular dynamic simulations to calculate the heating of dense plasmas in laser fields. Comparisons with the analytic results for different plasma parameters are given. We consider isothermal plasmas as well as two–temperature plasmas. Furthermore results for the velocity distribution function under the influence of intense laser fields are presented which show a different behaviour in comparison to weak fields.