【摘要】 报道了神光Ⅲ原型激光装置上复杂打靶激光光路条件下的全孔径背反诊断系统。设计了大口径、长焦距菲涅耳透镜,收集激光打靶产生的散射光;采用真空空间滤波的方式,对激光打靶光路终端光学组件中镜片反射的杂散光与需要的非线性效应导致的背反信号进行空间分离。该系统可以同时测量激光等离子体相互作用中产生的受激拉曼散射和受激布里渊散射的光谱分布和散射光能量信息,为激光靶耦合能量平衡精密诊断提供了诊断条件。更多还原

【Abstract】 Full aperture backscatter station on Shenguang Prototype laser facility is reported.Large aperture and long focus Fresnel lens is designed for collecting the scattering light in the view of the laser beam focusing lens. The nonlinear scatter signals have separated from background light from laser optical mirrors in space by employing vacuum space filter.The scatter light energy and spectrum of the full aperture backscatter have measured in the hohlraum experimental on SG laser facility simultaneously.This offered possible important reference for exactitude energy balance of laser coupling.更多还原