基于LIBS技术的黄铜等离子体特征参量的研究  

Measurement of brass plasma parameters based on laser-induced breakdown spectroscopy

作　　者：赵小侠[1] 罗文峰[2] 张相武[1] 李院院[1] 杨森林[1] 

机构地区：[1]西安文理学院物理学与光电工程系,西安710065 [2]西安邮电大学电子工程学院光电子技术系,西安710121

出　　处：《激光技术》2013年第1期93-96,共4页Laser Technology

基　　金：西安市科技计划项目--西安文理学院科研创新基金资助项目(CXY1134WL02);陕西省教育厅科学研究计划资助项目(12JK1108)

摘　　要：为了减小测量误差,采用改进的Boltzmann方法和Lorentz函数拟合方法,迭代计算得到黄铜等离子体的电子温度是6051K,拟合CuⅠ324.75nm得到等离子体的电子密度是3.3×1017cm-3。结果表明,经过9次迭代,电子温度的线性相关系数由0.73提高到0.98;经过15次叠加,电子密度的拟合相关度由0.90提高到0.96。这一结果对于精确求解等离子体的特征参量是有帮助的。In order to minimize the measurement errors, an improved iterative Boltzmann plot method and Lorentz fitting method were used. The electron temperature Te in brass plasma was 6051K with the iterative calculation, and the electron density Ne of 3.3 ×10^17cm^-3 was inferred from the Stark broadened profile of Cu I 324. 75nm. The results show that the correlation coefficient is increased from 0. 73 to 0. 98 after 9 iterations in calculation of Te, and the correlation coefficient increases from 0. 90 to 0. 96 after 15 averaged numbers in calculation of Ne. The results are helpful to accurately calculate the parameters of plasma.

关 键 词：激光技术 等离子体特征参量 迭代玻尔兹曼方法 黄铜 

分 类 号：O53[理学—等离子体物理]