Compton散射下等离子体初温对质子产生的影响  

Influence of Initial Plasma Temperature on Proton Generation under Compton Scattering

作　　者：文桦[1] 郝晓飞[2] 郝东山[2] 

机构地区：[1]黄淮学院电子科学与工程系,河南驻马店463000 [2]黄淮学院信息工程学院,河南驻马店463000

出　　处：《激光与光电子学进展》2012年第8期141-146,共6页Laser & Optoelectronics Progress

基　　金：河南省基础与前沿技术研究项目(092300410227)资助课题

摘　　要：应用多光子非线性Compton散射模型和二维particle-in-cell(PIC)粒子模拟程序,研究了Compton散射下等离子体初始温度对质子产生的影响,并进行了数值模拟。结果表明:与Compton散射前相比,随着等离子体初始温度的增加,产生的质子数有更显著的增加,靶前和靶后质子能谱曲线趋于平滑,加速质子数量的差别减小。当入射激光强度增强时,随着等离子体初始温度的增加,质子增加的相对幅度有明显减小。当入射激光强度减弱时,随着等离子体初始温度的增加,质子能谱曲线仍有清晰的区别,质子数量和速度都有明显的增加。The influence of initial plasma temperature on the proton generation under Compton scattering is studied by using the model of multi-photon nonlinear Compton scattering and two-dimensional particle-in-cell（PIC） simulation,and the results are numerically simulated.The results show that the amounts of produced proton have an even noteworthy increase along with the increase of the initial plasma temperature than that before the Compton scattering,the energy spectrum curves of the protons before and after the target tend to be smooth,and the differences in the number of accelerated protons are decreased.When the incident laser intensity is increased,the relative extents of the proton number increasing are clearly decreased along with the increase of the initial plasma temperature.When the incident laser intensity is decreased,the energy spectrum curves of the protons still have clear differences with the increase of the initial plasma temperature,and the number and speed of protons are clearly increased.

关 键 词：非线性光学 等离子体 质子加速 二维Particle-in-cell粒子模拟程序 多光子非线性COMPTON散射 

分 类 号：O539[理学—等离子体物理]