Highly efficient acceleration and collimation of high-density plasma using laser-induced cavity pressure

Details Highly efficient acceleration and collimation of high-density plasma using laser-induced cavity pressure Highly efficient acceleration and collimation of high-density plasma using laser-induced cavity pressure

2010-01-05

arxiv.org/abs/1001.0679v1

Physics

Plasma Physics

4 pages, 6 figures

Scientific paper

A novel efficient scheme of acceleration and collimation of dense plasma is proposed and examined. In the proposed scheme, a target placed in a cavity at the entrance of a guiding channel is irradiated by a laser beam introduced into the cavity through a hole and accelerated along the channel by the pressure created and accumulated in the cavity by the hot plasma expanding from the target and the cavity walls. Using 1.315-um, 0.3-ns laser pulse of energy up to 200J and a thin CH target, it was shown that the forward accelerated dense plasma projectile produced from the target can be effectively guided and collimated in the 2-mm cylindrical guiding channel and the energetic efficiency of acceleration in this scheme is an order of magnitude higher than in the case of conventional ablative acceleration.

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