Laser-induced breakdown spectroscopy of gas mixtures of air, CO2, N2, and C3H8 for simultaneous C, H, O, and N measurement

被引:110
作者
Sturm, V [1 ]
Noll, R [1 ]
机构
[1] Fraunhofer Inst Lasertech, D-52074 Aachen, Germany
关键词
D O I
10.1364/AO.42.006221
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Laser-induced breakdown spectroscopy (LIBS) was applied for simultaneous measurement of the elements C, H, N, and O in CO2-air, C3H8-CO2, and C3H8-N-2 gas mixtures at atmospheric pressure. A single 7-mm-diameter aperture at the sample chamber was used for 1064-nm Nd:YAG laser irradiation and plasma signal output to an echelle spectrometer. Double-pulse laser bursts of similar to8-ns pulse width (FWHM) and 250-ns interpulse separation were applied to increase the plasma signal. Calibration curves of the LIBS signal versus the partial pressure or the atomic abundance ratios were taken by dilution series in intervals that are relevant in the combustion of heptane (C7H16) near an equivalence ratio of 1. (C) 2003 Optical Society of America.
引用
收藏
页码:6221 / 6225
页数:5
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