谱色散匀滑化光束空间大尺度传输过程的模拟实现  

Accomplishment of Numerical Simulation for a SSD Beam Propagation in a Large Scale Plasma

作　　者：李斌[1] 刘占军[1] 郝亮[1] 胡晓燕[1] 郑春阳[1] 项江[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100094

出　　处：《中国激光》2017年第12期34-38,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(11575035)

摘　　要：谱色散匀滑化技术在大型激光聚变装置上得到了广泛应用。以焦平面内谱色散匀滑化光束的光强分布作为激光等离子体相互作用程序LAP3D的边界条件,实现了谱色散匀滑化光束在黑腔大尺度等离子体传输过程中的模拟。采用改进算法实现了焦平面内谱色散匀滑化光束光强分布的高效并行计算,从而对整个光束在等离子体中的传输过程进行模拟,分析了谱色散匀滑化光束调制频率对光束传播的影响。Beam smoothing by spectral dispersion（SSD）technology is widely adopted in larger laser fusion facilities.Using intensity distribution of SSD beam at its focus plane as boundary condition of laser plasma simulation code LAP3D,we simulate the propagation of SSD beam in large scale hohlraum underdense plasma.High efficiency parallel calculation of intensity distribution of a SSD beam at its focus plane is accomplished with improved algorithm,and then the simulation of entire beam propagation can be processed.The effect of modulation frequency of SSD beam on beam propagation is analyzed.

关 键 词：物理光学 光束匀滑 谱色散匀滑化 数值模拟 激光等离子体 

分 类 号：TN0[电子电信—物理电子学]