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

作　　者：刘明伟 李儒新 夏长权 刘建胜 徐至展 

机构地区：[1]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2010年第7期369-376,共8页中国物理B（英文版）

基　　金：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);the Hunan Provincial Natural Science Foundation of China (GrantNo. 09JJ3012)

摘　　要：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.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.

关 键 词：laser-plasma interaction ion acceleration substrate-ion density gradient 

分 类 号：O53[理学—等离子体物理]