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Shock wave plasma induced emission generated by low energy nanosecond Nd:YAG laser in open air and its application to quantitative Cr analysis of low alloy steel

Authors :
Nasrullah Idris
Marincan Pardede
Koo Hendrik Kurniawan
Kiichiro Kagawa
May On Tjia
Source :
AIP Advances, Vol 8, Iss 5, Pp 055121-055121-11 (2018)
Publication Year :
2018
Publisher :
AIP Publishing LLC, 2018.

Abstract

We report the result of an experimental study that shows the remarkable benefits of generating a micro shock wave plasma by low energy (800 μJ) nanosecond (ns) Nd:YAG laser irradiation on a solid target in open air and the efficient detection of the induced plasma emission. The very low irradiation power density of 0.8 MW/cm2 produced by the slightly defocused laser beam gives the additional advantage of rather wide crater size of 400 μm on the sample surface, thus enabling average analysis and reducing the ion production responsible for the undesirable emission background as well as the Stark broadening effect, and thus leading to largely improved spectral quality. This is corroborated by the result of spectra measured from a number of metal samples which display the sharp emission lines with low background. Specifically, its application to Cr analysis of a series of low alloy steel samples with different Cr concentrations is shown to yield a linear calibration line of adequate dynamical range and an estimated detection limit of about 10 ppm.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
8
Issue :
5
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.054799574ad74963b2a1a89bd1417273
Document Type :
article
Full Text :
https://doi.org/10.1063/1.5027425