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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.107: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Laser pulse duration as a key parameter in plasma grating formation — •Götz Lehmann and Karl-Heinz Spatschek — Heinrich-Heine-Universität, Düsseldorf
Prompted by early experimental realizations of plasma-optical components, we examine how finite formation times affect the quality and scaling behavior of a plasma grating induced by the ponderomotive potential of two counter-propagating pump laser beams. Besides the plasma density, the ratio of thermal to ponderomotive pressure is known to be an important factor. Via full Vlasov simulations we show that the ratio of the laser pulse duration to the characteristic ion reaction time is another important parameter. These simulations also reveal that (linearized) kinetic models for electron-temperature-dependence need to be extended in order to recover the correct behavior for gratings generated by short laser pulses. A generalized simple hydrodynamic model allows to study the dependence of the grating amplitude on the pump laser amplitude a0.
Keywords: laser-plasma interaction; plasma density grating; high-intensity laser pulses