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P: Fachverband Plasmaphysik
P 8: Laser Plasmas I
P 8.6: Vortrag
Dienstag, 1. März 2016, 16:00–16:15, b302
Inverse Faraday Effect driven by Radiation Friction in Ultraintense Laser-Plasma Interactions — •Tatyana Liseykina1, Sergey Popruzhenko2, and Andrea Macchi3,4 — 1Institut für Physik, Universität Rostock, Germany — 2National Research Nuclear University, Moscow Engineering Physics Institute, Russia — 3National Institute of Optics, Pisa, Italy — 4Department of Physics, University of Pisa, Italy
In the interaction of extremely intense laser pulses with thick targets, as foreseen with next generation lasers such as ELI, radiation friction effects are expected to convert a major fraction of the laser energy into incoherent radiation. For a circularly polarized laser pulse, the radiative dissipation allows to absorb electromagnetic angular momentum, which in turn leads to the generation of an ultrastrong (Gigagauss) axial magnetic field. Such Inverse Faraday Effect driven by radiation friction in demonstrated and analyzed in three-dimensional simulations. Simple models for the efficiency of radiative losses, the transfer of angular momentum to ions and the saturation value of the magnetic field provide the estimates of these quantities which are in fair agreement with the simulation results. With the advent of multi-petawatt laser systems, the investigated effect may provide a macroscopic signature of radiation friction.