等离子体初始温度对强激光与等离子体相互作用中的高能质子产生的影响  

Influence of Initial Plasma Temperature on Energetic Proton Generation From Laser-Plasma Interactions

作　　者：宾建辉[1] 雷安乐[1] 余玮[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《中国激光》2009年第6期1416-1419,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(10734130;10775165;10875158)资助项目

摘　　要：用二维particle-in-cell(PIC)粒子模拟程序研究了等离子体初始温度对强激光与物质相互作用过程中高能质子产生的影响。观察到不同的等离子体初始温度会影响靶前激波的形成时间,进而影响质子产额。数值模拟显示当等离子体初始温度适度增大时可以得到更高的质子产额。The influence of initial plasma temperature on energetic proton generation from the intense laser plasma interactions is studied by using two dimensional particle-in-cell simulation. It is found that the time required for the shock formation can be affected by the initial plasma temperature, which influences the energetic proton generation in the shock. Simulations show that high proton yield can be obtained by increasing the initial plasma temperature moderately.

关 键 词：激光等离子体 高能质子 粒子模拟 等离子体温度 激波 

分 类 号：O53[理学—等离子体物理]