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MPINP:
Research group K. Z. Hatsagortsyan – Division C. H. Keitel
Abstract:
Parametric instabilities in laser-plasma interactions are investigated in the ultrarelativistic
regime, including the leading-order term of the Landau-Lifshitz radiation
reaction equation. After a detailed exploration to the theory of parametric instabilities,
the effects of the radiation reaction force on the growth rate are discussed by comparing
to the results without radiation reaction force. The radiation reaction force leads
to merging of the two Raman branches and also excites new modes, e.g. the so-called
quasi-modes. Furthermore the radiation reaction force increases the endurance of the
short wavelength perturbations. Increased endurence affects the quality of the laser pulse
shape, which is important particularly for experiments, which require a precisely-shaped
laser pulse.
