Abstract
In this paper we present our new results obtained during the experiment performed on Prague Asterix Laser System. We used cavity pressure acceleration method [Borodziuk et al., Appl. Phys. Lett. 95, 231501 (2009)] to obtain superfast macroparticles. Two different ways of macroparticle acceleration were investigated: “forward” and “backward” acceleration. The best results for the velocity (obtained for 20 μm polystyrene foil) approach 1.0 × 108 cm/s. Also, the hydrodynamic efficiency of the energy transfer to the accelerated macroparticle is much higher compared to conventional ablative experiments. Additionally, application of the “covered channel” targets gives an evident increase of density of accelerated plasma outbursting from the channel, which is a key problem from the point of view of possible applications in impact fast ignition area.
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