Filamentation and forward Brillouin scatter of entire smoothed and aberrated laser beams
Filamentation and forward Brillouin scatter of entire smoothed and aberrated laser beams
复制标题
DOI：
10.1063/1.874055
复制
发表时间：
2000-04
影响因子：
2.2
通讯作者：
C. Still;R. Berger;A. Langdon;D. Hinkel;L. Suter;E. Williams
中科院分区：
文献类型：
--
作者：
C. Still;R. Berger;A. Langdon;D. Hinkel;L. Suter;E. Williams
激光-等离子体相互作用对光束的细尺度散斑和较大尺度包络强度都很敏感。一段时间以来，人们对取自激光束横截面部分的体积进行了模拟，并推断了多次模拟的结果以预测整个光束的行为。然而，这种外推很可能会忽略较大尺度结构对精细尺度的影响。唯一确定的方法是模拟整个光束。这些非常大的计算直到最近才变得可行，但现在它们可以在大规模并行计算机上实现。全光束模拟显示了平滑光束和像差光束的传播和分解的巨大差异。
Laser–plasma interactions are sensitive to both the fine-scale speckle and the larger scale envelope intensity of the beam. For some time, simulations have been done on volumes taken from part of the laser beam cross-section, and the results from multiple simulations extrapolated to predict the behavior of the entire beam. However, such extrapolation could very well miss effects of the larger scale structure on the fine-scale. The only definitive method is to simulate the entire beam. These very large calculations have not been feasible until recently, but they are now possible on massively parallel computers. Whole beam simulations show the dramatic difference in the propagation and break up of smoothed and aberrated beams.