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Laser-induced breakdown spectroscopy enhanced by a micro torch

Identifieur interne : 000217 ( Main/Exploration ); précédent : 000216; suivant : 000218

Laser-induced breakdown spectroscopy enhanced by a micro torch

Auteurs : Lei Liu [États-Unis] ; Xi Huang [États-Unis] ; Shuo Li [États-Unis] ; Yao Lu [États-Unis] ; Kevin Chen [États-Unis] ; Lan Jiang [République populaire de Chine] ; Jean-François Silvain [France] ; Yong Feng Lu [États-Unis]

Source :

RBID : Hal:hal-01160308

Abstract

A commercial butane micron troch was used to enhance plasma optical emissions in laser-induced breakdown spectroscopy (LIBS). Fast imaging and spectroscopic analyses were used to observe plasma evolution in the atmospheric pressure for LIBS without and with using a micro torch. Optical emission intensities and signal-to-noise ratios (SNRs) as functions of delay time were studied. Enhanced optical emission and SNRs were obtained by using a micro torch. The effects of laser pulse energy on the emission intensities and SNRs were studied. The same spectral intensity could be obtained using micro torch with much lower laser pulse energy. The investigation of SNR evolution with delay time at different laser pulse energies showed that the SNR enhancement factor is higher for plasmas generated by lower laser pulse energies than those generated by higher laser energies. The calibration curves of emission line intensities with elemental concentrations showed that detection sensitivities of Mn I 404.136 nm and V I 437.923 nm were improved by around 3 times. The limits of detection for both Mn I 404.136 nm and V I 437.923 nm are reduced from 425 and 42 ppm to 139 and 20 ppm, respectively, after using the micro torch. The LIBS system with micro torch was demonstrated to be cost-effective, compact, and capable of sensitivity improvement, especially for LIBS system operating with low laser pulse energy.

Url:
DOI: 10.1364/OE.23.015047


Affiliations:


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<div type="abstract" xml:lang="en">A commercial butane micron troch was used to enhance plasma optical emissions in laser-induced breakdown spectroscopy (LIBS). Fast imaging and spectroscopic analyses were used to observe plasma evolution in the atmospheric pressure for LIBS without and with using a micro torch. Optical emission intensities and signal-to-noise ratios (SNRs) as functions of delay time were studied. Enhanced optical emission and SNRs were obtained by using a micro torch. The effects of laser pulse energy on the emission intensities and SNRs were studied. The same spectral intensity could be obtained using micro torch with much lower laser pulse energy. The investigation of SNR evolution with delay time at different laser pulse energies showed that the SNR enhancement factor is higher for plasmas generated by lower laser pulse energies than those generated by higher laser energies. The calibration curves of emission line intensities with elemental concentrations showed that detection sensitivities of Mn I 404.136 nm and V I 437.923 nm were improved by around 3 times. The limits of detection for both Mn I 404.136 nm and V I 437.923 nm are reduced from 425 and 42 ppm to 139 and 20 ppm, respectively, after using the micro torch. The LIBS system with micro torch was demonstrated to be cost-effective, compact, and capable of sensitivity improvement, especially for LIBS system operating with low laser pulse energy.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>France</li>
<li>République populaire de Chine</li>
<li>États-Unis</li>
</country>
<region>
<li>Aquitaine</li>
<li>Nouvelle-Aquitaine</li>
<li>Pennsylvanie</li>
</region>
<settlement>
<li>Bordeaux</li>
<li>Pittsburgh</li>
</settlement>
<orgName>
<li>Université de Bordeaux</li>
<li>Université de Pittsburgh</li>
</orgName>
</list>
<tree>
<country name="États-Unis">
<noRegion>
<name sortKey="Liu, Lei" sort="Liu, Lei" uniqKey="Liu L" first="Lei" last="Liu">Lei Liu</name>
</noRegion>
<name sortKey="Chen, Kevin" sort="Chen, Kevin" uniqKey="Chen K" first="Kevin" last="Chen">Kevin Chen</name>
<name sortKey="Huang, Xi" sort="Huang, Xi" uniqKey="Huang X" first="Xi" last="Huang">Xi Huang</name>
<name sortKey="Li, Shuo" sort="Li, Shuo" uniqKey="Li S" first="Shuo" last="Li">Shuo Li</name>
<name sortKey="Lu, Yao" sort="Lu, Yao" uniqKey="Lu Y" first="Yao" last="Lu">Yao Lu</name>
<name sortKey="Lu, Yong Feng" sort="Lu, Yong Feng" uniqKey="Lu Y" first="Yong Feng" last="Lu">Yong Feng Lu</name>
</country>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Jiang, Lan" sort="Jiang, Lan" uniqKey="Jiang L" first="Lan" last="Jiang">Lan Jiang</name>
</noRegion>
</country>
<country name="France">
<region name="Nouvelle-Aquitaine">
<name sortKey="Silvain, Jean Francois" sort="Silvain, Jean Francois" uniqKey="Silvain J" first="Jean-François" last="Silvain">Jean-François Silvain</name>
</region>
</country>
</tree>
</affiliations>
</record>

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