New Method of Laser Plasma Spectroscopy for Metal Samples Using Metastable He Atoms Induced by Transversely Excited Atmospheric-Pressure CO2 Laser in He Gas at 1 atm

元データ 2008-03-25

概要

A high-power transversely excited atmospheric-pressure (TEA) CO2 laser (600–1500 mJ) was focused on a metal target in surrounding He gas at 1 atm to produce strong He gas breakdown plasma, while leaving the metal surface undamaged, and a Q-switched Nd:YAG laser (60–90 mJ) was also simultaneously focused on the metal surface to be ablated at a slightly shifted spot position with various delay times (0–150 μs) relative to the TEA CO2 laser. It was concluded that the ablated atoms from the metal sample enter the He gas plasma region and are excited by metastable He atoms, which are produced in very large quantities in the He gas plasma region. Due to the fact that He gas plasma works as an exciting source with a very long lifetime (about 100 μs), the detected atomic emission lines are very narrow in spectral width with a very low background spectrum, and also the atomic emission spectrum profile does not follow the Boltzmann distribution during the long emission life. We call this new method LIPS-He*. This new method has high potential for realizing in situ high-sensitivity analysis.

著者

Niki Hideaki Program Of Nuclear Power And Energy Safety Engineering Graduate School Of Engineering University Of
Kurniawan Koo Research Center of Maju Makmur Mandiri Foundation
Kagawa Kiichiro Department Of Fiber Amenity Engineering Graduate School Of Engineering Fukui University
Idris Nasrullah Department Of Fiber Amenity Engineering Graduate School Of Engineering Fukui University
Ramli Muliadi Program Of Nuclear Power And Energy Safety Engineering Graduate School Of Engineering University Of
Niki Hideaki Program of Nuclear Power and Energy Safety Engineering, Graduate School of Engineering, University of Fukui, Fukui 910-8507, Japan
Kagawa Kiichiro Department of Physics, Faculty of Education and Regional Studies, University of Fukui, Fukui 910-8507, Japan
Idris Nasrullah Department of Physics, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia
Kurniawan Koo Research Center of Maju Makmur Mandiri Foundation, 40 Strengseng Raya, Kembangan, Jakarta Barat 11630, Indonesia
Ramli Muliadi Program of Nuclear Power and Energy Safety Engineering, Graduate School of Engineering, University of Fukui, Fukui 910-8507, Japan

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