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.