激光诱导石墨等离子体羽的时／空分辨光谱的测量和分析

MEASUREMENTS AND ANALYSES OF TEMPORALLY AND SPATIALLY RESOLVED SPECTRA OF GRAPHITE PLASMA PLUME INDUCED BY LASER

摘要: 本文报告了在不同的ＹＡＧ激光束能流密度下（０．２Ｊ／ｃｍ￣２一３００Ｊ／ｃｍ￣２）产生的石墨等离子体羽的时间和空间分辨光谱的测试结果，并据此分析了羽的形成和发展过程，给出了可能的动力学模型及ＣⅢ，ＣⅡ和Ｃ＿２的速度和粒子数密度的变化情况．

Abstract: Measurement results of temporally and spatially resolved spectra ofGraphite plasma plume induced by YAG laser at different energy fluencies(0.2J/cm￣2-300J/cm￣2)are reported. Depending on these results,we have analysed the creation anddevelopment processes of the plume, suggested a dynamic model and obtained the changeof vefocities and number densities of CⅢ,CⅡ and C_2 in the plume.