当前位置：
X-MOL 学术
›
J. Anal. At. Spectrom.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Compact diode-pumped Nd:YAG laser for remote analysis of low-alloy steels by laser-induced breakdown spectroscopy
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7ja00319f V. N. Lednev 1, 2, 3, 4, 5 , A. E. Dormidonov 3, 4, 6, 7 , P. A. Sdvizhenskii 3, 4, 5 , M. Ya Grishin 1, 2, 3, 4, 8 , A. N. Fedorov 1, 2, 3, 4 , A. D. Savvin 3, 4, 6, 7 , E. S. Safronova 1, 2, 3, 4 , S. M. Pershin 1, 2, 3, 4
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2017-12-13 00:00:00 , DOI: 10.1039/c7ja00319f V. N. Lednev 1, 2, 3, 4, 5 , A. E. Dormidonov 3, 4, 6, 7 , P. A. Sdvizhenskii 3, 4, 5 , M. Ya Grishin 1, 2, 3, 4, 8 , A. N. Fedorov 1, 2, 3, 4 , A. D. Savvin 3, 4, 6, 7 , E. S. Safronova 1, 2, 3, 4 , S. M. Pershin 1, 2, 3, 4
Affiliation
|
A low weight diode-pumped Nd:YAG laser (400 g, 1064 nm, 5 ns, 130 mJ per pulse) was developed for a compact laser-induced breakdown spectroscopy (LIBS) system to be installed on a robotized arm. Fiber optics delivery vs. conventional LIBS were compared for C, Si, Mn and Cr analysis in low-alloy steels. Fiber optics transformed the multimode laser beam to a flat-top beam with an improved fluence profile stability, resulting in shallow and more reproducible craters. A fast imaging study revealed that plasma generated by fiber optic pulses was plane-shaped, more uniform and dissipated two-fold faster compared with the plasma induced by direct laser beam focusing. Greater peak fluence for conventional LIBS provided plasma with 20–100 times more intensive emission due to the greater ablated mass, higher temperature and electron density. Improved reproducibility of shot-to-shot measurements was observed for plasma induced by fiber optic pulses, due to more stable ablation. The analytical capabilities of LIBS were compared for fiber optics vs. conventional LIBS in terms of calibration curve linearity, limits of detection and the root mean square error of the cross-validation procedure. Limits of detection for Si, Cr and Mn were always better for direct laser beam focusing; however, more importantly, the conventional LIBS system provided quantitative analysis for carbon in low-alloy steels (0.025–0.5% wt) with acceptable detection limits (55 ppm) while fiber optic pulses produced too-low intensity plasma.
中文翻译：
紧凑型二极管泵浦Nd：YAG激光器，用于通过激光诱导击穿光谱法对低合金钢进行远程分析
开发了一种轻量级二极管泵浦Nd：YAG激光器（每个脉冲400 g，1064 nm，5 ns，130 mJ），用于安装在机械臂上的紧凑型激光诱导击穿光谱（LIBS）系统。光纤交付与比较了传统LIBS在低合金钢中进行的C，Si，Mn和Cr分析。光纤将多模激光束转换为具有改进的注量分布稳定性的平顶光束，从而产生较浅且更可重复的弹坑。一项快速成像研究表明，与直接激光束聚焦引起的等离子体相比，光纤脉冲产生的等离子体呈平面状，更均匀并且耗散速度快两倍。由于更大的烧蚀质量，更高的温度和电子密度，传统LIBS的更高峰通量为等离子体提供了20–100倍的高强度发射。由于消融更稳定，因此观察到了由光纤脉冲诱发的等离子体的逐次测量结果具有更高的重现性。LIBS的分析能力为光纤进行比较对常规LIBS在校准曲线线性，检测限和交叉验证程序的均方根误差方面。对于直接聚焦激光束，Si，Cr和Mn的检出限总是更好。然而，更重要的是，传统的LIBS系统提供了对低合金钢（0.025-0.5％wt）中的碳的定量分析，且检测限为可接受的（55 ppm），而光纤脉冲产生的等离子体强度太低。
更新日期：2017-12-13
中文翻译：
紧凑型二极管泵浦Nd：YAG激光器，用于通过激光诱导击穿光谱法对低合金钢进行远程分析
开发了一种轻量级二极管泵浦Nd：YAG激光器（每个脉冲400 g，1064 nm，5 ns，130 mJ），用于安装在机械臂上的紧凑型激光诱导击穿光谱（LIBS）系统。光纤交付与比较了传统LIBS在低合金钢中进行的C，Si，Mn和Cr分析。光纤将多模激光束转换为具有改进的注量分布稳定性的平顶光束，从而产生较浅且更可重复的弹坑。一项快速成像研究表明，与直接激光束聚焦引起的等离子体相比，光纤脉冲产生的等离子体呈平面状，更均匀并且耗散速度快两倍。由于更大的烧蚀质量，更高的温度和电子密度，传统LIBS的更高峰通量为等离子体提供了20–100倍的高强度发射。由于消融更稳定，因此观察到了由光纤脉冲诱发的等离子体的逐次测量结果具有更高的重现性。LIBS的分析能力为光纤进行比较对常规LIBS在校准曲线线性，检测限和交叉验证程序的均方根误差方面。对于直接聚焦激光束，Si，Cr和Mn的检出限总是更好。然而，更重要的是，传统的LIBS系统提供了对低合金钢（0.025-0.5％wt）中的碳的定量分析，且检测限为可接受的（55 ppm），而光纤脉冲产生的等离子体强度太低。
京公网安备 11010802027423号