Characteristics of Hydrogen Emission in Laser Plasma Induced by Focusing Fundamental Q-sw YAG Laser on Solid Samples

元データ 2004-07-15 Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics

概要

Hydrogen emission has been studied in laser plasma by focusing a Nd-YAG laser (1,064 nm, 50 mJ, 8 ns) on various types of samples, such as copper plate, zinc plate and glass plate. Several parameters influencing the emission were varied, such as the type of gas (air, nitrogen and helium), gas pressures (ranging from 2 up to 760 Torr) and laser power density. It was found that Hα emission with a narrow spectral width occurs with high efficiency when the laser plasma is produced in the low-pressure region. It was also confirmed that the conventional well-known laser-induced breakdown spectroscopy (LIBS), which usually carried out at atmospheric air pressure, cannot be applied for the analysis of hydrogen as impurity. This specific characteristic of the pressure dependence of hydrogen is interpreted based on our shock wave model, taking account of the fact that the hydrogen mass is extremely light compared to that of the host elements.

著者

MARUYAMA Tadashi Japan Agency for Marine-Earth Science and Technology
Kagawa Kiichiro Department Of Fiber Amenity Engineering Graduate School Of Engineering Fukui University
KURNIAWAN Hendrik Research Center of Maju Makmur Mandiri Foundation
PARDEDE Marincan Department of Electronic Engineering, Faculty of Industrial Technique, Pelita Harapan University
SUYANTO Hery Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University
Idris Nasrullah Department Of Fiber Amenity Engineering Graduate School Of Engineering Fukui University
Hedwig Rinda Hardware Laboratory Bina Nusantara University
Kobayashi Takao Department Of Bioregulatory Function Graduate School Of Medicine The University Of Tokyo
Maruyama Tadashi Japan Nuclear Cycle Development Institute, International Cooperation and Technology Development Center, 1, Shiraki, Tsuruga, Fukui 919-1279, Japan
Lie Tjung Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat 11630, Indonesia
Idris Nasrullah Department of Fiber Amenity, Faculty of Engineering, Fukui University, 9-1 Bunkyo 3-chome, Fukui 910-8507, Japan
Hedwig Rinda Hardware Laboratory, Bina Nusantara University, 9 K.H. Syahdan, Jakarta 11480, Indonesia
Kurniawan Hendrik Research Center of CV. Maju Makmur Mandiri, Srengseng Raya No. 40, Jakarta Barat 11630, Indonesia
Kobayashi Takao Department of Fiber Amenity, Faculty of Engineering, Fukui University, 9-1 Bunkyo 3-chome, Fukui 910-8507, Japan

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