A quick simultaneous multispot laser induced breakdown spectroscopy (LIBS) system has been proposed. The basic idea is to combine the Diffraction Beam Splitter (DBS) with the linear-to-linear fiber bundle. The DBS divided the incident laser beam into five sub-beams, and then, a lens focused the incident sub-beam to produce a plasma array, where the distance between the neighbor subplasma was constant and the plasma emission was imaged on the fiber bundle. Each ablated spot on the sample generated the corresponding spectroscopy signals, which were collected by the defined fibers of the fiber bundle, propagated to the spectrograph slit, and then analyzed by the intensified charge-coupled device (ICCD) detector, where the two-dimensional capability of the charge-coupled device detectors was explored for the spectroscopy and position analyses. The five spectroscopy ribbon presented on the ICCD corresponded to the plasma radiation of the five ablated spots. The feasibility of a simultaneous multipoint spectroscopy detection at a single pulse ablation was confirmed by subjecting to the spectroscopy analyses of a copper plane, layered material, and magnesium-molybdenum mixture. The multispot LIBS system can be used in the ejecta research of detonation physics, fluid physics, and so on.

中文翻译：

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基于衍射分束器的多光斑激光诱导击穿光谱系统

已经提出了一种快速同时多点激光诱导击穿光谱（LIBS）系统。基本思想是将衍射分束器 (DBS) 与线性到线性光纤束相结合。DBS 将入射激光束分成五个子光束，然后，透镜将入射子光束聚焦以产生等离子体阵列，其中相邻子等离子体之间的距离恒定，等离子体发射成像在光纤束上。样品上的每个烧蚀点都会产生相应的光谱信号，这些信号由纤维束的定义纤维收集，传播到光谱仪狭缝，然后由增强型电荷耦合器件 (ICCD) 检测器进行分析，其中二维探索了电荷耦合器件检测器的光谱和位置分析能力。ICCD 上显示的五个光谱带对应于五个烧蚀点的等离子体辐射。通过对铜平面、层状材料和镁钼混合物进行光谱分析，证实了在单脉冲烧蚀中同时进行多点光谱检测的可行性。多点LIBS系统可用于爆轰物理、流体物理等喷射物研究。