[平面镜装置对激光诱导等离子体辐射特性的影响]

[Effect of flat-mirror device on laser-induced plasma radiation characteristics].

作者信息

Chen Jin-Zhong, Bai Jin-Ning, Chen Zhen-Yu, Cheng Chen, Sun Jiang, Wei Yan-Hong

机构信息

College of Physics Science and Technology, Hebei University, Baoding 071002, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2013 Aug;33(8):2039-42.

PMID:24159841

Abstract

To improve the quality of laser-induced breakdown spectroscopy, flat-mirror device was proposed. The effects of flat-mirror device on the radiation characteristics of laser-induced plasma were studied. The experimental results showed that when the device consisted of three flat-mirrors placed around the plasma, the spectral line intensity of Mg, Fe, Ba, Ti and Al increases by about 116.2%, 96.43%, 90.93%, 102.1% and 98.57% than that without flat-mirror device, and the signal-to-noise raises by around 39.17%, 32.48%, 38.07%, 39.95% and 21.30%,respectively. By measuring the plasma parameters, the mechanism of the radiation enhancement obtained with the device consisting of three flat-mirrors was explained. This method was an effective way to improve the detection capacity of LIBS.

摘要

为提高激光诱导击穿光谱的质量，提出了平面镜装置。研究了平面镜装置对激光诱导等离子体辐射特性的影响。实验结果表明，当该装置由围绕等离子体放置的三个平面镜组成时，Mg、Fe、Ba、Ti和Al的谱线强度比无平面镜装置时分别增加了约116.2%、96.43%、90.93%、102.1%和98.57%，信噪比分别提高了约39.17%、32.48%、38.07%、39.95%和21.30%。通过测量等离子体参数，解释了由三个平面镜组成的装置实现辐射增强的机理。该方法是提高激光诱导击穿光谱检测能力的有效途径。