激光技术, 2014, 38 (3): 357, 网络出版: 2014-06-30
激光诱导紫铜等离子体过程中的逆韧制辐射效应
Inverse bremsstrahlung effect in process of laser-induced copper plasma
激光技术 等离子体 发射光谱 电子温度 电子密度 laser technique plasma emission spectrum electron temperature electron density
摘要
为了研究激光等离子体相互作用过程中逆韧制辐射效应, 用1064nm Nd∶YAG激光器诱导产生紫铜等离子体, 建立3条铜原子谱线的Boltzmann图, 计算得到紫铜等离子体的电子温度为6902K。通过测量铜原子谱线324.75nm的Stark展宽, 计算得到紫铜等离子体的电子密度为3.6×1017cm-3;基于铜等离子体的特征参量, 得到紫铜等离子体的逆韧制辐射系数是0.021cm-1。结果表明, 该光谱分析方法可以在避免对等离子体产生扰动的情况下, 得到等离子体的特征参量。
Abstract
In order to study inverse bremsstrahlung (IB) effect in process of laser-induced copper plasma, copper plasma was induced by Nd∶YAG laser at 1064nm. The electron temperature 6902K of the copper plasma was calculated with the Boltzmann plot of 3 Cu Ⅰ lines. By measuring the Stark broadening of Cu Ⅰ at 324.75nm, its electron density of 3.6×1017cm-3 was obtained. Based on these characteristic parameters of copper plasma, the inverse bremsstrahlung coefficient of 0.021cm-1 was obtained. Experimental results show that the plasma parameters can be obtained without any disturbance with the spectral analysis method.
赵小侠, 贺俊芳, 王红英, 杨森林, 李院院, 张相武. 激光诱导紫铜等离子体过程中的逆韧制辐射效应[J]. 激光技术, 2014, 38(3): 357. ZHAO Xiaoxia, HE Junfang, WANG Hongying, YANG Senlin, LI Yuanyuan, ZHANG Xiangwu. Inverse bremsstrahlung effect in process of laser-induced copper plasma[J]. Laser Technology, 2014, 38(3): 357.
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