论文部分内容阅读
激光束聚焦性能研究是激光推进技术研究中的一个重要内容。根据实验装置的形状和激光强度分布,建立了计算模型,编写了计算程序。用该程序可通过计算空间某点的激光能流密度和某个区域的能流密度分布来确定点火线的形状和点火区域的大小;研究喷管内壁的表面粗糙度和入射激光束的强度分布对聚焦性能的影响。为进一步研究激光支持等离子体流场特性和脉冲激光推进性能等提供重要的理论依据。
Laser beam focusing performance research is an important part of laser propulsion technology. According to the experimental device shape and laser intensity distribution, the calculation model was established and the calculation program was compiled. Using this program, the shape of the ignition wire and the size of the ignition area can be determined by calculating the laser fluence and the energy density distribution of a certain point in space. The surface roughness of the nozzle inner wall and the intensity distribution of the incident laser beam Impact on focusing performance. It provides important theoretical basis for further study on the characteristics of laser-supported plasma flow field and pulsed laser propulsion.