Effects of substrate-ion density gradients on light-ion acceleration from ultraintense laser pulse irradiated thin-foils

doi:10.1088/1674-1056/19/7/075203

Abstract A general solution of the electrostatic potential that determines the maximum light-ion energy is derived for the test-particle acceleration model by taking into account the influence of the substrate-ion density gradient. It is shown that the substrate-ion density structure is also dependent on laser pulse duration. In the picosecond or sub-picosecond regime, the decreasing density gradient of the substrate-ions leads to an evident reduction in the acceleration efficiency of the light-ions. However, this kind of influence is negligible in the ultrashort regime.

Keywords: laser—plasma interaction ion acceleration substrate-ion density gradient

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PACS:	52.50.Jm	(Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))
	52.25.Dg	(Plasma kinetic equations)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10734080), the National Basic Research Program of China (Grant No. 2006CB806000), the Chinese Academy of Sciences, the Shanghai Commission of Science and Technology (Grant Nos. 06DZ22015 and 0652nm005), and the Hunan Provincial Natural Science Foundation of China (Grant No. 09JJ3012).

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Liu Ming-Wei (刘明伟), Li Ru-Xin (李儒新), Xia Chang-Quan (夏长权), Liu Jian-Sheng (刘建胜), Xu Zhi-Zhan (徐至展) Effects of substrate-ion density gradients on light-ion acceleration from ultraintense laser pulse irradiated thin-foils 2010 Chin. Phys. B 19 075203

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Effects of substrate-ion density gradients on light-ion acceleration from ultraintense laser pulse irradiated thin-foils

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