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http://dx.doi.org/10.5762/KAIS.2014.15.3.1259

Effect of Surface Damage of Metal Substrate on LIBS Signal  

Jang, Sang-Ik (Division of Mechanical Engineering, Chungbuk National University)
Kim, Kibum (Division of Mechanical Engineering, Chungbuk National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.3, 2014 , pp. 1259-1264 More about this Journal
Abstract
Hydrogen is in the world limelight for future energy source, and it has been already used in various industry fields including aerospace. The extremely fine molecule of the hydrogen can be easily leaked from tiny size of the crack on the surface of transporting pipes or storage tanks, and it could bring on awfully terrible disaster. In this study, Laser-Induced Breakdown Spectroscopy (LIBS) was employed to develope a reliable detection scheme for a small quantity of hydrogen leakage. Effect of three different metal substrates (i.e. Al, Cu, SUS) on plasma generation and the intensity of the hydrogen atomic signal was investigated, and the surface damage of the substrates due to repetitive laser shots was observed using Scanning electron microscope. It was also evaluated how the surface damage could distort the atomic signal. The intensity of the atomic signal was found to be the strongest, and the signal distortion due to the surface damage was approximately $100W/m^2$ lower when Al was used for the substrate.
Keywords
Laser Induced Breakdown Spectroscopy(LIBS); Leakage; Hydrogen;
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