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SYLF: Symposium Wechselwirkung in starken Laserfeldern
SYLF 4: Plasma
SYLF 4.4: Talk
Tuesday, March 16, 1999, 15:15–15:30, zo1
Ultrafast Electron Relaxation in Dense Laser Plasmas — •H. Haberland1 and M. Bonitz2 — 1Institut für Physik, EMA-Universität, 17487 Greifswald — 2Fachbereich Physik, Universität Rostock, 18051 Rostock
The relaxation of the electron distribution function in a
dense hydrogen plasma in the presence of a strong laser pulse is
investigated.
We solve quantum kinetic equations which include two–particle scattering
in an electromagnetic field as well as quantum many-particle effects [1].
Furthermore, the momentum–anisotropy of the electron distribution is fully
taken into account (non–perturbatively). The influence of memory effects
is
investigated [2,3] and, in particular,
the effect of the field on the relaxation on the femtosecond scale.
Additional effects, such as collisional broadening and field-induced
retardation (intra-collisional field effect) are studied
in their dependence on frequency and field strength.
We report first numerical results and discuss prospects of further research.
[1] D. Kremp, M. Bonitz, Th. Bornath, and M. Schlanges, submitted to Phys. Rev. E
[2] M. Bonitz, D. Kremp, D.C. Scott, R. Binder, W.D. Kraeft, H.S. Köhler, J. Phys.: Condens. Matter 8, 6057 (1996)
[3] M. Bonitz, Quantum Kinetic Theory, B.G. Teubner, Stuttart/Leipzig 1998